I've used this "lot" a few times now. Not the best experience to say the least! I had an engine that lasted a weekend and about 140 miles, no help from the seller or first choice to resolve the fact that I and my customer were about to be out of pocket. Luckily he understood that with a second hand engine you pay your money and take your chance. However I'd have expected it to last more than a weekend. The seller offered a putrid amount in compensation for the problem that didn't even cover the cost of the injector that their engine ruined when it self destructed! Recently I had a gearbox from another company, the selector fitting was slightly different (not a major problem) however the gearbox code had been purposely defaced and covered in their "tamper proof paint"!) after fitting the box I removed the oil drain plug to drain any residue oil only to find a considerable amount of water came out first! I suspect this was rain water from however long the gearbox had been knocking around in their yard for although I was told it had just been removed from a 84,000 mile running vehicle that they had driven. Take away point here is that they'll let any cowboys supply any old rubbish! Be aware.