[Dick Steinkamp]

I think we can take a guess at the typical difference between asking and selling prices. Bob's MEDIAN data (average adjusted for inflation) shows a pretty steady $18-20k average asking price over the last 20 years.

I'd guess that ASKING prices are about 20% greater than actual selling prices making the average selling price over the last 20 years adjusted for inflation $14-$16k. You can adjust Bob's ASKING prices to SELLING prices based on your best guess of the difference.

Another way to adjust ASKING to SELLING is to pull together a sample...big enough to make it statistically sound...of actual first time ads and final sales results. Somewhat time consuming, but nothing like the heavy lifting Bob has already done for us.