Here I am at the edge

A matter of perspective  This year, on eBay I have taken the action to block a small percentage of prospective buyers; the reason is I believe they are using the site to run a refund scam . There are two ways of viewing my actions. Yes, I could be losing sales. On the other hand, if I send the DVD , and they "claim" a refund  I have to send money back not knowing if they have the goods. If the disc is delayed, but not lost in the post, and turns up I am doubly out of pocket - as I have no disc, or money for the sale. It is a sad world when trust is replaced by doubt , but that is how the world runs these days.