For me, it would be the possible worth, personal value, and relevance as what is old is new again (read: retro).
No doubt that I valued it, my Intellivision:
I had a good 150 games for it, and played them like there was no tomorrow; unfortunately, my then-9 to 11-year old self got caught up in the misguided mindset of "newer
must = better"...
Sold all of it in 1986 for a Nintendo.. I barely had 10 games for it, and it immediately bored me. I couldn't get the Intellivision back, and by 1990, the last game came off the line, and was gone completely.....
Or so I thought.
Intellivison Lives! came out for the Sony PlayStation 2 and had a good 40 or so games on it; unfortunately since the PS3s dropped PS2 emulation, I lost that as well..
.. or so I thought. Intellivison Flashback is now out, thanks to the original developers of those games back in the early 80s, and back in its original design of a gaming console, plus has 60 games on it. Not all that I had, but perfect enough for me (incidentally, they also released an Atari Flashback and ColecoVision Flashback, in their original consoles).
For me, and as much as I loved those classic games, this was like selling your dog, then being able to get it back a year later, after missing it so much.
BL.