So far this is what I found:

What's available, out there in the wild (for a reasonable price)

Macintosh SE - $9.99



http://lowendmac.com/compact/macintosh-se.html

LC I - $29



http://lowendmac.com/lc/macintosh-lc.html

Centris 610 - $29



http://lowendmac.com/quadra/centris-610.html

(Some of these numbers might be starting bids)

Obviously if we do not mention the source, we can talk about price all we want!