I spent a lot of time reading through posts and figuring out dimensions and sizes with a measuring tape, but I found one that I absolutely love. There are a few things you should consider when buying a used fur coat. First of all, has it been stored well? I.e. no smokers, and cats are generally a bad sign as well. You don't want your coat having a funky odor! Also look for items that still have supple skins, meaning it bends easily and is not stiff. As fur gets older, the skin part gets tougher. The toughness can be prevented by having the coat conditioned regularly, but most people do not do so for their coats. You also want to avoid coats that have bare patches or "fuzzy" fur, meaning not sleek, silky and soft.
Before starting your Ebay search, you should get an idea of what type of fur you want. Different animals give you different looks and insulation. Fox is very fluffy and warm (I love mine!). Mink has shorter hairs, but it is also very thick and very soft. Do some research on types, lengths and colors before jumping into Ebay. Otherwise, you risk becoming overwhelmed!
I am very impatient and prefer instantaneous gratification, so I only buy things on Ebay with a "buy it now" option. While I realize this kind of defeats the point of Ebay, I don't care. I bet you will have even more great coat options if you look at the bidding posts as well. Either way, Ebay is a great alternative to stores when in search for fur.