I would be pretty depressed if I collected for N64 too 
Agreed.
BARTRE—DEAREST GODS OF THE HEAVENS, you left out a tremendously important detail.
No wonder you were wondering how to proceed. BURN ALL N64 items immediately.
LE PLAN:
1. On sale, you can get large 56 quart bins w/covers. Bigger sizes can become too heavy, unwieldy, hard to dig stuff out of. Smaller sizes are better for digging stuff out, but if you are ORGANIZED and buy CLEAR BINS, 56 quart is, IMHO, a very nice compromise. CLEAR BINS will make life easier, even if you label stuff, it's nice to see contents at a glance.
2. If no kids/animals around, you can stack these to the ceiling (danger! It won't be stable). Other stack formations are possible, depending on floor space available. But, worst-case scenario, you stack to the ceiling—in the bedroom, perhaps, since we all know you aren't getting any action in there.
3. TRIAGE your collection.
BIN X = Absolutely KEEP N64 console and stuff that INTRIGUES you.
BIN Z = N64 you are not in love with! You possess it simply because you were trying to "collect 'em all" DON'T put a game here simply because "everyone thinks it is crap"...you may actually have fun goofing around with Superman with family/friends...this game actually provides entertainment, so it belongs in BIN X or Y.
BIN Y = Le Middle Ground.
The REASON to TRIAGE is to accurately assess how you rank different items. YOU DON'T have to sell anything, and you are allowed, over the following months/years, to move things into different categories. HOWEVER, should you decide to SHED, SHARE, TRADE, SELL some N64 stuff, you have a very good idea of what specific items are involved, and where to find them.
4. At first sign of the Apocalypse—Send BIN X to Necro, BIN Z to me, send BIN Y to Bernie.
