I Am a HVAC tech in training and we just received new units In Our class my instructor gave us the old ones that are in perfect condition I don't have any use for it so i wanna put it on Craigslist but I dont have a clue on what to ask for it. it is a Byrant R410 a puron model number 591bn060-a. I received the condensing unit and the evap. Coil both of them were kept indoors and are in excellent condition. So whatcha think would be a fair asking price? Thanks for our time.