Modern MC showcased this 1:144 scale Frank Lloyd Wright Falling Water dollhouse made by Steven Bebe in these two blog posts a few years back in her Malibu Beach DH and Kaleidoscope House. Ever since I have been looking on ebay with no luck for similar gems.
I love the work Oese is doing in 1:144. This red and white apartment building was on ebay. I as well couldn't buy it, but I love Oese's version of it. Here are more pictures of it on her blog, Raum für Raum.
Here is Oese's Villa Sibi that she made as a custom order.
Another one of Oese's houses that I love is her version of the Green Condo with Roof Garden from the Green Dollhouse Project. Here are more pictures and details on the building of this mini house.
As well as Oese's collection of mini miniatures and shot of her mini-workshop.
(images from MiniModern blog, Raum für Raum blog, ebay and Green Dollhouse Project)