Posted By:
Scott MosleyI have a couple of items listed on eBay right now. On some of the auctions I've included a back scan where I felt it makes a difference in either disclosing the condition of the card or if the back displays some type of variation that is important to the auction description.
Where I don't think it makes a difference, I don't include back scans. Call me lazy, cheap or both. (I'd vote for both) 
Its certainly possible that I am losing potential buyers this way but I've always found that if I am interested in a card and ask a seller for a scan of the back of the card, I can get one 95% of the time and then decide accordingly on whether or not to bid.
Scott