Ebay prices

oh man i just LOVE trying to fix my dell optiplex gx110, but it doesn't seem to want to start. so i go on ebay to find parts for it, and they end up going for like 20 - 100$ + the wack delivery prices that come with them, 80$ for a replacement motherboard... atp i might as well buy the entire tower again, but i can't do that because the price for a new one is like 70 bucks with over 20$ shipping???? that or its like 130$ with 50$ shipping... i can't be spending that much money on a tower that runs windows 2000 wth am i gonna do.