For 200 you could probably land yourself an old criterion telescope or used Skywatcher. The important part is the aperture. For good nebula and Galaxy viewing, you’re going to want at least 6 in of aperture. But more is better.
Definitely check Craigslist, Facebook marketplace, and cloudy nights classifieds.
Agreed on aperture fever. I find 10" the largest manageable size unless you get an Obsession Ultra Compact for $$$$$.
Didn’t really consider binos for OP since viewing anything more than 45 degrees up is a pain without a proper mount. A dob is easier to use near the horizon than using a bino to view straight upwards.