As far as I am concerned I will not use ebay after I recently discovered that some bids are being inflated by friends of the owner - a slightly dangerous practice - but it seems to excite a determined buyer to go higher than necessary. Just another scam.
I also bought a XD card and fortunately paid via PayPal. I didn't get the card but did get my money back - after about 7 weeks!
And..............the rogue element is getting worse as events of recent weeks have proved - with three people getting long prison sentences for a most well organised scam that netted them well over a 1/4 million pounds in goods that didn't exist.
Be very careful.