On UK eBay right now is a Princess Eilonwy doll, mistakenly listed as an Alice doll.
Search for: Alice In Wonderland Porcelain Doll Disney Princess DeAgostini C104
I have no interest or idea what she's worth myself, but I've read in Disney Princess threads that she's a popular character with members here.
Plus I think that porcelain dolls are really nice, and at £1.75 start price (no bids yet) I think somebody could get a bargain doll for their collection. x