You might like a Sony TCM-200DV. I've been buying broken ones ($5-$15), fixing them, and selling them on Ebay ($30-$65). They have a half speed switch as well as speed knob, so you can get extreme speed variation. Only 1/8 inch in and out and only mono, but still great for experimental music. I have 2 auctions starting at noon Eastern today. I also recommend the Marantz PMD-201, 221, or 222. I fix those too. They also have half speed switch as well as speed control knob. But they have many additional useful features, such as manual record level and more input and output options. The 221 and 222 are three head units, which allows you to monitor the sound of the recording from the tape in near real time. 3 head units can also be configured with a mixer to create tape delay. The 222 has XLR connectors. The 420 is a stereo 2-head and 430 is stereo 3-head. The stereo models also have Dolby and DBX noise reduction, but no speed control.