I am seriously procrastinating getting work done tonight, but here are a some more houses on ebay.
There is a Kaleidescope House (1:12 scale) on ebay with a starting bid of $125 and a buy it now for $195 with free shipping. Check out listing here.
There is an interesting finished Brookwood dollhouse (1:12 scale, kit sold by Greenleaf. The exterior is a little retro 70's but I'm kinda diggin' it. Check out the digs here.
There also looks to be a house built with the reverse plans from the 3/4 scale Betsy McCall Do-It-Yourself Dollhouse plans from 1955. Check out the listing here.
Okay, now I really have to get back to work. :(