If you're only a casual e-Bayer, do you need to use Turbolister? Using e-Bay without really doesn't take too much time and you don't miss out on all that much.
I, too, am in a crap area where 36kbps is the norm. Some days I get up to 37,3kbps - magic! I know how annoying it can be when you find a large file that you want to download - too often you end up not bothering.
A neighbour is a computer tech and is thinking of getting satellite broadband which he would let people within a mile use (rural area so not many). Maybe you could gather a few people together and try something like this if phone line is so dodgy.
Goodluck.