Generally, if something has decent value and demand, I'll sell it on my own. If something is not of much value, I'll often either rotate it to a secondary system or give it away. For example, I have a surround sound receiver on a secondary computer now that was formerly used in my bedroom system and is about 10 years old. It doesn't hold much value and I'll probably give it away. I recently upgraded a DAC in the main system. I bought the old DAC lightly used (about 3 weeks) and got about 80% of what I paid for it. It was a brand that holds value well and I bought it a few hundred less than what it costs the seller originally. I also recently sold a preamp/process I bought used a few years back. I got about 70% of what I paid for it but I got it at a good deal. As the other post noted, dealers are not usually going to give one an overly generouse deal on something traded in. Buying used right is not the worst way to go, especially with something that has a demand.