Hardest to let go - At the time my Capt. Fantastic with an NOS playfield. Probably the nicest on the planet. But, the offer was too good to pass up. Shortly after, I tired of my Bally line up and sold them all.
Hardest to sell - Bally El Toro. I’ll bet I sold 50 other games while I had this one for sale. I finally sold it a few days before Christmas, to someone who wanted a game for their family, when my other inventory was gone. I think I got $100 for it, which I was happy with. Back in that era, I offered 1/2 back in trade in to customers to keep a stream of inventory. When he called, I gave him the trade in value, but wouldn’t take his machine in trade. No way I wanted that turd back.