I have now relocated something that might come as a shock to some folk.
In a Larry Selman online auction, Spring 2002, a single
White Mouse with two lumps of Cheese, in a dome of just under 2 3/4 inches diameter, had a sale estimate of $2,500 - 3,500 :!:
The price realised was: $5,225 :shock: :shock:http://www.lhselmanltd.com/auc27/34.html
It is thought that the extremely high price was a result of two bidders fighting for it without "normal" consideration of usual prices. But even the original estimate was high, in my opinion.
Nevertheless, Paul Ysart's White Mice weights do now take high money, but perhpas reality is beginning to set in again. But the $600 quoted for an example on eBay seems a snip - I don't recall seeing that one - and I wonder what its condition was?