I was actually able to find a Dell Optiplex with 12gb for 300. I have a 128GB ssd i've put in it for the os and am going to use the 500gb drive that game with it for video storage. I'll likely expand that in the future once I find out how much that will retain for me, but with only a couple of cameras the 500gb might cut it for me. Now I just need to drill some holes and mount those cameras, which im going to try and do this weekend if it doesnt rain.
Thanks!