What brands tend to have the worst resale value?

Hands down worst depreciation are Wilson Audio speakers, e.g. Alexia new $55k+ but used 1 to 2 years later $16-20k



OUCH!

Martin Logan, Vienna Acoustics, Anthony Gallo, Linn, Definitive Technology...these brands tend to sit on Craigslist forever.  

I’ve bought only used gear for the last 15 years or so. I try to stick with brands I know will give me most, if not all of my money back when I resell It (eg McIntosh, Manley phono). Buying before listening to a component is a crapshoot, no matter how good the review is. The worst one for me was a wyred 4 sound integrated, STI-500 I think. I overpaid for it used, hated the sound, and promptly fried the left channel (don’t ask). After getting it repaired, I sold it after months of trying, and lost quite a few dollars on it.

Vapor Audio Prob the Worst, 75K Speaker not worth more than 10K in today's money.