I think equineshine.com is SUPER good, but will be a TOUGH sell, requiring some real world legwork. I know for a fact that horse coat products are GOOD business, so if you could find a equestrianly oriented entrepreneur you might spark an inspiration in them and they can buy the domain and develop a new product around it. It could happen, and I'm sure it would assuming you've got time and are willing to call around and see what you can make happen, or send targeted emails to some website owners with similar, existing businesses. If you do I would place a solid $2000 appraisal on it.
EDIT:
peerlesspets.com
Would make a GREAT pet pedigree showcase and sellers/buyers site. At least 2 grand within the context, probably a little more but $2000 or so seems it would be a much easier sell to someone within that industry who likes the idea and has been waiting for their crack at making a name within that world.