I need help finding another fork to replace a 20 years old RST fork, coil type, that bottomed out and broke on the inside last week riding in the woods. No manual or pics of it anywhere that I can find.

I saw some old Rockshox Judy XC and Duke XC on craigslist for around $50 but not sure if they would last long.
There's a few months old Tora TK for a little over $100 or new one at $200 on brinvo.com

Any recommedation for a $100 and/or $200 fork with minimal maintainance? Thanks in advance.

What size steering tube is on your fork ?

1" or 1 1/8"

How much travel does your old fork have ?

I'll take some measurement tonight after work to be sure but my visual guess is 1 1/8" and 60mm of travel.
RST fork was a very entry level came with a chromoly mtb purchased in Beaverton, OR, in early 90's.

There's also a listing of a working Duke XC for under $40 as another option.

Most big manufacturers' forks are very hard to maintain after they are ~3 yrs old due to lack of spare parts support. THe simple RST fork is more likely repairable than any of the ones you listed should they ever fail. Since it doesn't work now, try to tear the RST down and see if you can't make it work. You have nothing to lose.

However, if you look online you can find new forks from last year for ~$100 - $200.

Edit: For example (although this one is not available, I didn't look that hard.) https://www.bikeman.com/FK8702.html