The price isn't bad for an 1861 Half Eagle as long it's a problem-free piece is XF/Better condition. If it's heavily worn and/or damaged then I'd take a pass. Here's one that sold for $375 last week on Heritage:
http://coins.ha.com/common/view_ite...e=PCGS131115
http://coins.ha.com/common/view_ite...e=PCGS131115
ANA #R3154474


















