My wife and I recently upgraded our iPhones, given the apparent value of used iPhones on eBay. The first one was sold via Buy It Now, to someone who turned out to be a scammer from Nigeria. Though I haven’t yet confirmed the vileness of the second purchaser, I strongly suspect a similar situation.
It appears that perhaps “it’s now completely impossible to sell a laptop on eBay” (or cell phone). This could really hurt eBay if this keeps up, but it’s not entirely clear how they can prevent it. They’d almost need to have a system where a user with positive feedback will vouch for any new user. Even that can be gamed, but it’s harder. Both of the scammers going after our phones have 0 feedback.
Take my advice: if you have an electronic doodad to sell and put it on eBay, be very wary of any buyer with 0 feedback and never trust the email messages you receive.