I use Gixen. not too sure what the cost is after a certain amount of snipes, but it is enough for me to use free so far. I have been using it for about 2 months and have sniped 7-10 items. It works very well, and I agree it will definitely save you some money. They best way for my is to put in my absolute max, set it up on a snipe, and see what happens. If i don't win oh well, It was over my max price. If i do win, then score. It almost always comes in under my max price.
Currently Collecting:
Baseball HOFers: Autos, Vintage and Rookies
Dallas Cowboys: Autos and Vintage
Baseball HOFers: Autos, Vintage and Rookies
Dallas Cowboys: Autos and Vintage