A few notes about buying on eBay on-line shops:
It is quite common practise for small companies, like a family run business with little or no IT skills, to use eBay as an on-line shop - they avoid the expense of setting up a commercial web-site and both parties in the transaction have payment security.
On the top right of the eBay auction form look at the Seller information box - ideally you want to see lots of buyer feedback and all of it good. This particular seller has made 800+ sales with an almost perfect sales record.
Sounds good - just read the feedback comments to make sure - and they seem to be really OK with genuine comments.
Check the postage - some sellers charge little for the item and make their profit on the P&P. But this seller is only charging