I ended up posting the HP 42a toner and was instantly offered $68 by two bots. Should go for $90-$100 easily so at least I have a floor to get lol. Not too bad for $14 from Facebook marketplace.
You can be horrible with electronics but sealed LaserJet toner is quick and easy. No expiration dates like inkjet printer inks. Those expired inks still sell but generally for a lot less, below $25 which may or may not fit your business model.
Bankroll is $4.29. need to sell the 5 VCRs, 2 CD players and other miscellaneous items before we hit the thrift or Facebook. A friend of mine Apparently has a glut of video games to dump so he's shipping some to me.