I've seen the non-Apple branded RAM chips for sale cheaper than what you have found them for BUT the electronics supply houses that I have seen them for sale in all have a minimum order requirement. I would have had to have bought dozens of them to meet the minimum and I have no use for that many. I found a 128k board on ebay Australia that had the RAM chips removed because at one point the owner wanted to do a homebrew 512k upgrade but never got around to it. I got the board and the original chips in a plastic bag shipped from New Zealand for like $100 and if you've seen shipping charges from Australia/NZ and what a complete 128k motherboard normally sells for you know that's cheap.