Investors ask where to buy a list. The better question is which of four routes suits the niche you are working, because they differ enormously in cost, in effort and in how many competitors are reaching the same people.
List Vendors
Each route sits somewhere different on cost, effort and competition, worked through in lists and data for real estate investors.
The default, and the right starting point for most people.
You specify filters, they return records, you pay per record or by subscription. Fast, requires no expertise, and available the same day.
What they are good for. Testing a niche before committing effort. Volume when you need it. Filters that would be difficult to assemble yourself, particularly anything combining several data sources.
The limitation. Everyone has access to the same pools. A list you can buy in ten minutes is a list your competitors bought last month, which is why the standard filters produce the most contacted homeowners in your county.
What to check. Where the underlying data comes from, how often it is refreshed, and what the accuracy rate is in your specific state rather than nationally, per choosing a list provider.
County and Municipal Records
Slower, often free, and substantially less crowded.
Assessor records, recorder filings, probate court dockets, code enforcement, tax delinquency rolls, building permits, utility shutoffs in some jurisdictions.
Why this is the underused route. The friction is the moat. A list requiring a records request and three hours of formatting is a list almost nobody in your market has, and the people on it are receiving far less mail.
The trade. Format varies wildly by county, some records are online and some require a visit, and the assembly work is real. The method is in pulling county records yourself.
Your Own Observation
The data nobody else has, because it does not exist in any database.
Deferred maintenance, overgrowth, boarded windows, accumulated mail, tarps on roofs, vehicles that have not moved. These are condition signals no county flags and no vendor sells.
Why it works. Nobody else has the record, because it was never a record until you made it one. That exclusivity shows up directly in response.
The trade. It scales with time rather than money, which makes it right for investors with more of the first, detailed in driving for dollars.
Relationships
The cheapest deals in the business and the slowest channel to build.
Probate and estate attorneys. Property managers who know which landlords are exhausted. Contractors who quote work the owner cannot fund. Title staff. Divorce attorneys, handled with care.
These people encounter situations before any record exists, which means the lead reaches you before it reaches the list your competitors are buying.
It is not a list you build in a month, and that is the one that compounds, detailed in investor positioning.
The Sources Worth Knowing by Niche
Because the right route depends entirely on what you are looking for.
Probate. Court dockets, usually county level, sometimes online. Vendors also sell it, which is why the vendor version is crowded.
Tax delinquency. County treasurer or tax collector, usually published as a public list, and the owners on it can be reached well before the auction, per pre-tax-sale owners.
Code violations. Municipal code enforcement records, often available by request and rarely bought.
Pre-foreclosure. Public filings, and this niche carries specific legal requirements worth understanding first, explored in foreclosure purchase laws.
Vacancy. Postal service vacancy indicators through vendors, plus your own observation.
Absentee owners. Every vendor sells it, which is the problem. The extreme case is the owner with a mailing address abroad, which carries a withholding rule, per foreign sellers.
Expired listings and for-sale-by-owner. Requires MLS access or a relationship with someone who has it, as in expired listings and FSBO leads.
Tired landlords. No list exists. Assembled by stacking length of ownership, absentee status and property type.
Entity-Owned Property, Which Complicates Everything
A practical problem that shows up on every list and that vendors handle poorly.
A meaningful share of records show an LLC, a trust or an estate as the owner rather than a person. Mail addressed to an entity commonly reaches nobody who will act on it, and skip tracing an entity name returns considerably worse results than tracing an individual.
The routes through it: state business registries, which list registered agents and sometimes members. Recorded documents, which often name the individual who signed. And the property tax mailing address, which is frequently a person's home even where the owner of record is an entity.
That extra step is exactly the kind of friction that keeps a list uncrowded. Competitors buying the same records mail the entity, get nothing, and conclude the list is poor.
It is also where a genuine tired-landlord list comes from, since serious landlords hold in entities, per tired landlord leads.
What Makes a Source Good
Four questions worth asking of any list source.
How many competitors have it. Availability and competition are the same thing. If it takes ten minutes to buy, everyone has it.
How current is it. A probate filing from last week is a different proposition from one from two years ago.
How accurate is it. Ownership and address accuracy vary substantially by source and by county.
Does it indicate a situation or only a characteristic. Absentee ownership is a characteristic. A code violation is an event. Events indicate motivation and characteristics mostly do not.
That last distinction is the most useful filter for choosing where to spend effort.
Buying Versus Building
The strategic question underneath all of this.
Buying is fast, costs money, and produces a list your competitors also have. Building is slow, costs time, and produces something they do not.
For an investor starting out, buying makes sense. You need to learn whether a niche works before investing weeks assembling data for it, and the fastest route to that answer is a purchased test list.
Once a niche proves out, building becomes the better investment. The same records, assembled yourself with layers a vendor does not offer, produce a materially less contested list.
The pattern that works: buy to test, build to scale, explored in list stacking.
What to Avoid
Scraped data of uncertain origin. Cheap for a reason, and it carries both accuracy and legal problems, discussed in data privacy for investors.
Lists sold as exclusive that are not. Verify rather than accept the claim.
Anything marketed as motivated sellers already qualified. Qualification is a conversation, and a vendor selling pre-qualified motivation is usually reselling responses to their own marketing, which is a different product at a different price.
Buying volume you cannot work. Ten thousand records you never call is money spent on a spreadsheet, and the constraint is nearly always capacity rather than data.
Getting MLS-Derived Data Without a License
A recurring question, since several useful lists sit behind the multiple listing service.
Expired listings, withdrawn listings, and price-reduction history are all valuable indicators of a seller whose expectations have already been tested by the market.
Access generally requires a license or a relationship with someone who has one. Some vendors resell derived data, and what they can lawfully provide varies by market and by the rules of the local association.
The workable routes are a relationship with an agent who benefits from working with you, becoming licensed yourself if the volume justifies it, or using vendors while checking what their data actually is and where it came from.
What does not work is scraping listing sites, which typically breaches their terms and produces data of uncertain provenance, described in data privacy for investors.
Free Sources Investors Overlook
Several produce genuinely useful records at no cost beyond the time.
Obituaries, which precede probate filings by weeks and are public. Handled with obvious care about timing and tone, covered in talking to sellers in difficult circumstances.
Municipal condemnation and nuisance property lists, published in many places.
Utility disconnection records where available, which indicate vacancy earlier than most sources.
Landlord registration rolls in cities that require them, which is a tired-landlord list nobody sells.
Court dockets for evictions, which identify landlords in the middle of exactly the experience that makes people sell.
The First List to Build
If you are choosing one source to start with, choose the county records for the niche you most want to be known for.
It takes longer than buying, it produces a list almost nobody else in your market has, and the process teaches you how the records work in your county, which is knowledge that keeps paying.
Then buy a comparable vendor list as a control and mail both. Within a quarter you will know whether the assembly effort produces a better response, and that answer determines where your time goes for the next two years.