These were the shitz when they first came out- what... 3 years ago? Variable wattage and voltage, upgradeable firmware that is still available from Joyetech's site, clock, date and a bunch more user programmable menu options/settings. And they were not cheap- =/> todays prices for devices having TC and 20 times more power. Unfortunately, I agree $15- maybe $20 to the right buyer is about all you can hope for. Might help if the original box, et cetera was included.