Some sellers specify that you must have a feedback rating of at least 10, for example.
This may seem unfair, but contact the buyer direct and see if they will accept a bid from you.
It is a matter of trust between seller and buyer.
I have 100% positive feedback of 120 plus, gained by, if buying, paying immediately, and if selling, sending the goods, properly packaged as soon as possible, and not inflating the postage.
Also good communication is very important.
Do this and your ebay experience will be a happy one.