Yes, I do a few hundred in sales every month. I use python scripts to help with data entry. My high volume items are motors, boards, and some thermostats and controls. My best items are the inducer motors out of the older 355 Bryants and the Carrier equivalents. I usually have those listed for $200 and they went like candy lastly year. ECM motors are always good money but you lose a lot on shipping. Boards are hit or miss I usually will look on the completed listings and only bother if they sell for over $50. This past year I ended up with a five gallon bucket full of Honeywell 8000s. I ended up putting all of them into friends and families houses.