I've not much experience of EBay but DH has bought quite a lot of stuff, can't think of anything apart from an MP3 player that was electrical. Buys loads of cables/USB type things for his camera, PC & laptop. Out of about 50 purchases he's only ever had one problem one. Always pick someone with decent feedback & if they have any negs read them carefully, even email the buyers thru Ebay to ask if it was resolved etc.
A lot of them are stores selling end of lines etc so they should be pretty reliable but I would have thought some of the bigger online retailers would be similarly priced for end of lines etc. The seller you've linked to looks ok.
But why not try something like this type of site A google search will give you loads.
I brought a blender when first weaning DS that arrived filthy and didn't work. The people agreed I could send it back, but it was a big heavy item that would have cost a bomb to send back again, so I just accepted I had lost out. Wouldn't buy things like that again TBH. How much are they in the shops?