The first link is to a listing that does appear to be fraudulent. It has the following features:
1 - An Ebay account with a feedback score of 1. The one transaction was a $3 sale.
2 - A 3-day listing.
3 - The listing includes this message: Please contact me before you bid at my business email address *********@googlemail.com for the Buy It Now price and the terms of sale, otherwise i will not concider your bid.
4 - The bass has a low starting bid and no reserve.
5 - The same bass is indeed currently for sale in a listing that started two days earlier.