My wife and I ended up getting 7 NES Classics (part luck, part diligence), but we ended up giving them away as Christmas gifts rather than selling them. Crazy, I know.
We plan on getting a number of SNESs as well (we have our methods), but I think we'll probably again give some away as gifts rather than sell them.
I agree with one poster who said it is fun. We honestly enjoy the "hunt." I know, we're dorky. Sue us.
FWIW - I think demand for the SNES will be greater, given that everyone now knows how rare the NES Classics were...but I think that will be more than offset by more supply from Nintendo. So, I expect a lot of resell opportunity for folks early on, but I expect that to wane meaningfully.