It's ridiculous to NOT buy off eBay. If you buy a knockoff/fake, you're not paying much attention.
You're not going to get scammed if you take a look at their feedback percentage and amount of items sold. There's an incredibly small chance that someone with a very good reputation is going to scam you. You would have to be the FIRST person they do it to if they've made a decision to "retire" from eBay. Also, eBay has buyer protection now and will reimburse you for the purchase price and shipping if you don't receive the item or it's not as described or something.