(This question isn't about math.stackexchange exactly, so I'm unsure if it belongs in meta.math.stackexchange instead or somewhere else entirely.)
I somewhat-regularly have small math problems that I want solutions for, and where I'd be willing to pay for a solution (plus an explanation of that solution), but I probably can't afford, justify, or find a "real"/"professional" consultant like John D. Cook.
Since I like sharing knowledge, ideally I'd put up a dollar bounty here on math.stackexchange but I don't expect that to be possible/allowed any time soon. Are there any good options here?