I (and others) would probably feel more at ease bidding on any of your listings if you had photos you took yourself...most listings that have "stock" photos and a seller with zero feedback turn out to be scams, sadly...so you'd probably get more bids that way, too. :)
If I were a scam, I wouldn't get the credits anyway first until you verify that you got the item. I'm not a scam but I can post pictures... and I know my way around listia very well.