I got my Ultra Tremolo for $10.00 on Musician's Friend with free shipping. It's a great sounding pedal and has a good range of tones and speeds. However, this pedal cannot hold a 9V battery, making it slightly harder to fit into my board.
Tried this guy next to a Boss TR-2, and for some reason I liked this one better. It doesn't sound so "fake" compared to some of the higher end trem pedals I've played. Its a good addition to my board since I don't use ALOT of tremolo to shape my tone, but for $25 you can't pass that up.