A mate of mine has one of these for sale. Its currently got the gas set up on it but can be used with either.
http://www.machinemart.co.uk/shop/pr...&TC=SRC-clarke weld mig turbo
It comes with spare tips,liner and 4 reels of .6 wire. I dont know how old it is but it looks newish and it welds alright. He wants £100 for it + carriage.
Bob