The real sweet spot right now is mixing both: grab the systems you actually want to *play* regularly as originals (they're still reasonably priced for NES and Genesis stuff, though anything rare gets pricey fast), then use reproductions for the games that are either stupidly expensive or hard to find - nobody needs to drop $300 on Earthbound when a reproduction cart plays identically and costs $30.
One thing people sleep on: check local Facebook marketplace and estate sales before going online - I've seen folks unload entire console collections for way less than eBay pricing because they just want it gone, and you sidestep shipping damage that way. The market's honestly stabilized since the pandemic rush, so there's less artificial inflation happening, which means if you're patient you can find decent deals instead of panic-buying at inflated prices.