Tigger
I've bought a couple of guns from Holts auctions - one was a hundred year old English boxlock and the other was a Sharp Innova airgun. I bought both blind, based on the description only. I didn't pay big money for either, so didn't mind taking a punt. Both turned out to be spot on and quite a bit cheaper that I'd have paid in a shop.
I wouldn't pay decent money without having a good look and I've perhaps been lucky. Others may have different experiences, but if you take care there's no reason why you shouldn't get a good deal.
Cheers,
Bob