Was $54 really a lot for a complete copy? There isn't a pricing history online going back that far. I would have considered that a very fair price because it was CIB and sold for that basically new when you figure tax.
I was serious though about that comment earlier. If I had this one I'd sell it. I'm finding I'd get more days/years of daily use out of a pinball machine versus a valuable or a few valuable old games. I kind of wonder staring at the shelf next to me without running to ebay what i'd get if I just said F-it and sold that stuff and the retron5, used real hardware, and got a flash cart. I mean I've got Bomberman 2, Bonk, Bubble Bobble 2, Dragon warrior 4, Duck Tales 2, Gradius 2 retrozone, Gun Nac, Im Kid Dracula retrozone, Megaman 1-6 (2 and 5 with manuals), Mighty Final Fight, North & South, RC Pro Am 2, River City Ransom, and various others including a nes shell supervision 115in1 cart. All that stuff is that $40-50+ range games alone. SNES has a decent supply too especially the RPGs as most I have the maps/manuals for.
(Before posting I did a fast check, on that list alone minus the 2 retrozone carts, that's over $1300.) I could totally see without much reserve getting rid of a few of those which add up to at least a 1/3 of that. No I'm not asking for offers, if I do ever go that way you'll know about it. Sometimes I think I'd just be happier keeping the few I grew up with buying new and some of the after market 90s buys I'm attached to and that's it but I know I'd miss some of it in time (same goes with SNES because while I like Wild Guns, I don't need it yet I keep it.)