The seller's feedback on eBay does not look good.
Seen worse, he sold 48 of these basses with only 9 negative feedbackers? And of those 9 - 6 are from only 2 buyers?
The question is did he (or she) really ship 48 basses.
But I agree it looks too good to be true, he does have a lot of zero feedback buyers. And at 17.99 the listing screams scam. But as a worst case scenario you end up with USD 17.99 refunded, not too much to worry about?