I presume it is a bit like Amazon, with individual sellers, or a really good internet shop! You can pay with credit card, which gives the same protection.
I use it mainly for eye candy, as a lot of pieces are now out of my reach money wise.
You can ask a question about any item, scrolling down under each actual item.
There are some cracking pieces on there, though some prices are very rich considering the value of the pound to the euro. Hopefully that will calm down in time.