thinking of selling nitrous system, whats it worth??

i need to sell my whole nitrous kit from bottle to nozzle. i was wondering what is worth what do you guys think?

- nos purge kit
-nos #10 bottle
-nos bottle blanket
-nos bottle heater
-nos pressure guage
-nos push button with cord
-nitrous work solenoids (fuel/nitrous) found this last long over nos
-all braided lines from bottle to nozzle
-nos fogger2 nozzle

i have invested pretty good money into it.
what do guy's think i could sell it for?