I also find the sales history invaluable. I’ve found some of the sales histories to be incomplete though. For instance the house next door sold in 2002 for 168k. The flipper slapped a little bit of lipstick and rouge on the pig and sold it 2 months later for 229k. The last sale doesn’t show up on Zillow. You can figure out there was a sale by the 2005 taxes though. Anyway last year that same house would have easily sold for about 475k.