Anyone used Mac Store UK before?/Do they have a good reputation?

Hi guys,

I'm thinking about buying a Mac Pro from Mac Store UK (mac_store_UK on eBay) through eBay and was just wondering if anyone has had any experience with them? It's obviously a lot of money so I just want to be sure about them before I bite the bullet.

This is the Mac Pro I'm thinking of buying:

http://www.ebay.co.uk/itm/Mac-Pro-5...-4K-4TB-HDD-Flash-Drive-USB-3-0-/161979765396

Thanks