I have been debating about upgrading my current mig theres nothing seriously wrong with it and it has given me 8 years of use (was bought second hand as well) but it may pay to think about buying something better now before putting money into the existing, most of my welding is on cars so the replacement needs to have a low enough amperage for that but i do do some heavier fabrication, generally nothing about 6mm and i have a big stick welder for the really heavy stuff, i dont have a set budget as i dont want that to limit what i can buy but i dont want to spend silly money if i can help it, what single phase mig welders would you recommend that will comfortable weld thin car bodywork yet can cope with welding 6mm, are of good quality and likely to last a decent length of time, im happy to buy used if it means getting a good quality machine as long as spares are easy to get hold of should things need replacing, thanks guys