Just because you cannot afford them does not mean they
are hard to find.
The fact that you do see them on eBay from time to time actually means
that they are more common than you think. Lisa's are not at all "rare",
despite what the geographically challenged claim. However, it depends on
what model of Lisa we are talking about.
Actually I see the flurry of Lisa's, Altair's and a few other
machine apearing on eBay to be caused by the promise of high prices
more than availability. The promise of a large return for selling it
is sure to bring stuff out of the woodwork, regardless of how many
there actually are. Just look at how many one-off's/prototypes
appear.
Another one I'd add to the list of not being easily found
though, as they don't even appear on eBay that often, is the SOL-20.
Jeff
--
Home of the TRS-80 Model 2000 FAQ File
http://www.cchaven.com
http://www.geocities.com/siliconvalley/lakes/6757