H-A, you should look into some of the small multi-effects units, like the Boss ME-25, which has a built-in Looper, along with all the Guitar effects you're likely to need anytime soon. $129 for a small stand-along Looper isn't a bad price, but I see the Digitech Solo JamMan units showing up at GC for $80-100 used, and RC-2's for around the same price. A used ME-25 will run you around $100, about the price of a new Tube Screamer. Some of the Digitech multis also have built-in Loopers, but I'm not as familiar with their products.
BTW, A String, that is one lousy tale of customer service! IIRC, some of the Lexicon MPX series will do something like what you were expecting, in terms of interfacing with your PC.