He likes to collect hardware. He loves buying old systems and cartridges.
I like to collect software. Very few games are worth much to me individually, but I love the ability to fire up any old game when it pops in my head.
I ended up buying an SNES Mini on eBay that was jacked and loaded with ROMs from EVERY system it was capable of running. I understand wanting the original hardware, but for me, getting EVERYTHING preloaded for about $200 just made more sense for me.
I have bought two of those hacked systems from the same seller. I can check if they still offer them, and share a link to the product, but only if someone asks for the info. I'm not trying to promote anyone, but I feel like this is a market that could be prone to fakes, and I personally would appreciate someone suggesting a trustworthy seller.
It depends on what you want and where you are, honestly. I would recommend different things to people depending on whether they have a large pre-existing library of cartridges and a CRT or they just want to play some old stuff every now and then.
How dead is that NES? There are a few frequent faults in some models that aren't terribly hard to repair and used old consoles are getting expensive in general.
If you have the money for it and really want to go hardcore into the scene, you might look into an FPGA like the Super-nt. They typically aren't like all of those emulation boxes out there, compatible with real SNES cartridges and accessories but don't have to worry about the issues with aging hardware and works mostly native with modern TVs/etc. It's very expensive, but it's also definitely very cool.