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The Investor Strategy Guide
The preview showed you that winning bidders are overpaying. The guide shows you
who they are, what they pay, and where your own number should stop.
Reference edition · the 2026 sale closed at 5pm on Wednesday 26 August 2026; sealed bids were accepted from Friday 21 August
Two parts, one guide. A written report on how this market
prices parcels, and an interactive guide to every parcel in the 2026 offering.
Both are free with a free Mosaic account.
They rest on the same evidence: St. Louis County's delinquent-tax sale for sale years
2020 through 2025
— 6,177 bids across
2,635 parcels, counting every bid placed
rather than only the winning ones, joined to county parcel and assessment data.
Free
free with a free Mosaic account · both parts
Part one — the report
- 01Who overpays, and on what. What separates a
parcel won at 3× the runner-up from one won at 1.1×.
- 02The repeat buyers, by name. Entry year, exit
year, win rate, and margin trend across six sales — the continuity the public record
hides, because bidder numbers are reissued annually and none survives three
sales.Records in hand
- 03How the regulars bid. Three postures —
the one-parcel entrant, the specialist who farms a single property type, and the bidder who
submits again and again and never wins, because a sealed sale never tells them how far under
they were. The low bid that wins parcels for the biggest buyers needs volume most bidders
cannot fund; at small scale it wins nothing.
- 04What parcels have actually sold for, as a
share of county appraised value, broken out by school district, land use, and value band.
Part two — the interactive guide
- 05Every parcel in the 2026 offering, filterable
by offering round, opening bid, land use and school district — so you can narrow the list
to the parcels you care about rather than read all of it.
- 06A ceiling calculator. Enter your parcel, get
the RSMo 140.340 math on your number, not ours.Calculator
- 07Where every 2026 parcel's tax status stood when last checked, with each
card's own date, including which ones had already cleared their balance before the sale.
Where the data comes from
County bid records and bidder-registration rosters, obtained from St. Louis County under
the Missouri Sunshine Law, matched back to bid numbers one sale year at a time, then joined to
county parcel and assessment data.
What it does not do
- 01It names no price for any parcel. The
calculator runs the statutory math on a number you enter. It recommends no bid and forecasts no
sale.
- 02Per-parcel pricing is built on the five priced
sales through 2024. The August 2025 sale is in the research; the interactive guide's
comparison groups are not yet drawn from it.
- 03No redemption or deed outcomes. No source
we hold tracks whether an owner later redeemed, whether a deed issued, or what any buyer
ultimately made.
- 04It is market research, not advice. Not
legal, tax, or investment advice.
Free
Free with a free Mosaic account — one written report and an interactive guide.
Methodology: both parts are compiled from St. Louis County delinquent-tax sale bid records
covering every bid placed, not only winning bids — 6,177
bids across 2,635 parcels, sale years
2020–2025
— joined to county parcel and assessment data. Figures are reproducible from
the county bid record. This document is market research. It is not legal, tax, or
investment advice, it recommends no bid on any parcel, and it forecasts no future sale.
We strive to exceed your expectations with honesty and transparency.