Wasn't ever expecting to be posting here asking about my wives car

My mechanic recommended the more expensive turbo at Eurocarparts (two available), he's replaced dozens and never had any problems, they come with a two year warranty. I believe it's made by the, same manufacturer as BMW use. It's brand new, not a reconditioned unit. However, it's a few quid over £1k plus fitting!
Has anyone had any success with the recon units on ebay or elsewhere? Seem to be around around £300?? Plus a £150 refundable deposit.
Car is a keeper for the next 18 months and 20k miles, so would rather fix for long term reliability, but if possible to save £700 then that's obviously worth considering.
Look forward to your thoughts.
Graeme