i first started working a 10$ a hr job in a warehouse, a mechanic buddy of mine got a sheet of paper that said buying scrap catalytic converters, and so i went n sold 2 off my 84 bronco , then went to this guys house lol, he started out of his garage lol, started working out of a nissan 240sx then a month or two later got a van then started buying from friends in street racing community , then came summer- drove around found some demo derby guys lol, still have guys that sell to me and only me, and buy like 40 from them once a year lol among other things alt,starters,rims,rads,batteries, etc... , now i get emails of different parts that companies are looking for lol -- beware of buying from rolling gypsys also, tricky bastards, also when u first start, try to stick to shops, or if someone wants to meet up, do it at a friends shop or a busy gas station