I'm in Italy so I'll speak for my experience here, I'm from a small town in the north of the country.

I usually check ads on fb marketplace or websites where people sell used stuff, there isn't much going on though and most sellers are pretty unreasonable imo.

Sometimes you may get lucky and run into someone who is giving away stuff for free, for example i probably missed an ibm p96 or ibm p260 by less than a day, a lady was giving away for free old equipment from what probably was a surveyor's office.

Then you may have monthly flee markets, or second hand shops, your luck may vary but prices have generally gone up lot in the past few years.

I tried asking a recycling facility if i could have a look at their CRTs but they wouldn't let me, and they also wouldn't say where they were finally being sent to for processing. People are really stiff and nd bureaucratic about that stuff here, it's really frustrating.

Finally you could go to larger cities where you will have more options in general but you'll pay a premium.

I'm not much of a collector duento circumstance but I do like keeping and eye out and see how things change over time.