There's no open house at a foreclosure auction. The property sells "as-is, where-is": however it stands, with whatever is inside. Many are still occupied by the prior owner or tenants, so going in isn't a legal option before buying.
That makes external due diligence your best tool: area comparable sales, permit history (a recent roof or A/C is a good sign), open code violations, age and square footage from the appraiser, Street View photos, and the legal title analysis. With those you reconstruct the likely condition without going inside.
BIDROI pulls all those official sources per property and sums them up in the BIDROI Score, precisely to make up for the fact that you can't walk the house before you bid.
BIDROI computes the Strike Price, the BIDROI Score, and the legal risk for every Miami-Dade property.
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