Zero feedback doesn't mean scammer by default, it could, but it could be legitimate. I had 0 feedback when I signed up to buy something on ebay under another account. There is really no way to tell unless they start asking for your paypal address to arrange payment. If they paid, and your paypal account says OK to ship, then what can you do?
No offense, but I would never sell an expensive item on ebay. I get nervous for a hundred dollar sale! I know that selling local may not work for some due to location or demand, but the risks on ebay outweigh the rewards for me. Maybe I read these boards too much, but all I see are problems for sellers with high priced items. Perhaps the reality is much different and ebay is safe for the majority, but you wouldn't know it from reading the discussion boards!
But the bottom line is that if you do get a experienced scammer that knows the simple ways and tricks to manipulate ebay's policies, well, it just takes one, and ebay and paypal, according to repeated reports here, will throw you under the bus in favor of the buyer.
I hope it all works well for you and everything goes smooth.
