If you bid on Miami-Dade foreclosure auctions and are weighing alternatives to Property Onion, the short version is this: Property Onion is a statewide Florida aggregator — listings for every county, education, and title searches sold one at a time. BIDROI is a Miami-Dade specialist that includes the legal and financial analysis in the subscription. National platforms like Auction.com or PropertyRadar solve different problems (REO inventory and marketing lists). Which one fits depends on where you bid and how much of the analysis you want done for you.
Full disclosure: BIDROI is our product. This comparison sticks to verifiable facts about how each model works — as of August 2026 — and tells you plainly when the alternative is the better choice.
What does Property Onion actually offer?
Property Onion covers foreclosure and tax deed auctions across Florida's counties. You get aggregated listings with property data, filters, an educational library, and the option to order a title search on a specific property as a paid add-on (current pricing is on their site). For investors who bid across multiple Florida counties — or who focus on tax deeds — that breadth is genuinely useful, and no Miami-Dade-only tool replaces it.
Where does the aggregator model fall short?
The model leaves the hardest part to you: interpretation. A listing tells you a property exists and when it auctions. It does not tell you whether the foreclosing party is a bank or an HOA, whether a senior mortgage survives the sale and lands on you, what the property is really worth after repairs, or how high the winning bid is likely to go. You either learn to answer those questions from the court file yourself, or you pay per property for reports and still make the final call alone.
That per-property model also changes your cost math: casually researching 10 candidates a month with paid title searches costs more than most subscriptions — so in practice you research fewer properties, less deeply.
How is BIDROI different?
BIDROI only covers Miami-Dade, and automates the interpretation layer for every auction in the county:
- Legal analysis included. The platform reads the actual court file — including the complaint PDF — to classify the foreclosure type (bank, HOA, association) and estimate which debts survive the sale. Anything it cannot verify is marked "requires title search," not guessed.
- A number, not just a listing. Every property gets a BIDROI Score (0-100) and a Strike Price — the most you should bid while keeping your margin, built from market value, estimated repairs, inherited debt, and area competition.
- Real auction results. Across resolved Miami-Dade auctions BIDROI tracks, independent investors win about 4 of every 10, and the median winning bid lands about 33 percent above the final judgment. Aggregates by ZIP are free on the stats page.
- Bilingual. The entire platform works in English and Spanish — relevant in a county where most investors operate in both.
Plans start at $97 per month with a 7-day free trial (pricing).