Every one here is pretty familiar with the prices these things go for and if some ones not to bothered about the game (iv never herd of it so I cant comment) £125 is pretty close to the price (£135) of a new unit form Gbax + 128 ram from ebuyer. and for that extra tenner it doesn't seem worth the risks (no warranty, no grantee of quality) u take as a second hand buyer. try £90-£100 or stick it on ebay ?
Just my oppinon though, good luck.