I want to put either 20" or 22" rims on my 2004 Impala. I don't really know anything about rims other than that they are more expensive than I care for. Is ebay a safe place to buy rims for a cheaper price than going to a store? Do I need to look for some specific details to fit my make and model specifically?...or do all brands fit all kinds of cars? I would love any info anyone could give me! Thanks!!!