I want to buy another Kingston 1gb stick of PC2 5300 667mhz to match what I already have. The cheapest price online is about 130.00, so I checked eBay if I could find something cheaper. Ive found a whole bunch of RAM of the same specifications, however, by companies I have never heard of, or no name at all. Some of these sticks are going for about 70 dollars if not cheaper, a substantial amount cheaper than a standard Kingston. Would this be a bad idea to buy? What could I expect with a no name company like this, especially off of eBay? Is it bad to mix differant brand RAMs?