stay away from glassless, the best mig about for not alot of money is a clarke mig welders and you can buy them cheaper on the bay,, you can buy a large bottle on ebay as well.. as a welder myself i find them just the same as i did at work, well not as good speck wize but can still put out a canny weld. if you set them up right..

have you welded before???

if you have i'd just get a stick welder, then once you can weld with it you can weld with anything,, well TIgs a new story.. plus with a stick you'l save some £££ and you'l get alot more amps for your money, meaning less time dressing and prep work!