Looking for a good condition second hand engine

[Dave99uk]

Hey currently on the search for a good second hand rx7 twin turbo engine. There seems to be a very gd looking company on ebay selling engines and have one for £1395. with guranteed under 30,000 miles and fully tested with warrenty.
 http://cgi.ebay.co.uk/MAZDA-RX7-2-6i-TWIN-TURBO-13B-ROTARY-1992-1995-ENGINE_W0QQitemZ170162559837QQihZ007QQcategoryZ52640QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

anyone bought one of these off that guy before?