The skulls and skeletons are very reasonable, but like all
things on eBay you must keep your eye out on the bidding.
I have become an addict (I hope in the good sense), and
have been able to get great things for little money,
including a beaver skull ($25 with shipping), 2 pidgeons
(less than $20 each including shipping), a frog $12, and
32 butterflies (under glass) for $8! (of course, one
woman's 'little money' may be alot to someone else).
Check under taxidermy, or skeletons, and happy bidding!