As noted above, you need to find out precisely if your local systems you want to monitor are using P25 Phase I or Phase II - Phase II is newer obviously and you'll "pay for the privilege" basically to be able to monitor it effectively with a handheld or mobile/vehicle scanner. It's entirely possible to find P25 Phase I capable hardware used for $200, sure, but Phase II kinda bumps the price a bit because there's a limited number of scanners that can decode it and they're top of the line so getting one used will still be pricey.
I myself just found a Radio Shack Pro-668 P25 Phase I and Phase II capable scanner at a pawn shop $180 (I put it on layaway so I don't actually have possession of it just yet) - since Radio Shack is for the most part no longer what it used to be a lot of the Pro-668 models were dumped at about half their original pricing and sometimes even less when the stores officially closed in 2015 but of course they're not totally dead just yet. If you look on eBay you may find one or more for $200-300. I know you're expecting to keep it at the $200 price point and you might be able to do that for one but finding 3 of them at that price point is unrealistic at this moment unless someone has 3 to dump at one time.
I doubt you'll find any GRE (now out of business officially) or Whistler scanners at that price range and certainly there won't be any Uniden models for P25 Phase I and Phase II support for anywhere near $200, that's just how it goes these days.
Of course, if the systems are strictly P25 Phase I then you can look at other scanners that could be less costly like one of the older Uniden 396T/396XT models that are quite capable for that purpose - they may not provide the same level of audio decoding quality newer hardware can but they'd get the job done. Also older GRE models and potentially used Whistler hardware comes to mind as well (yes I do tend to focus on handhelds more than mobile/vehicle versions so their counterparts would work just as well).
Also keep the older Radio Shack models in mind like the Pro-96 (there's one listed in the RR Classified section presently by member Paco-Jerte - he (or she, I have no idea) seems to go through a lot of scanners quite often so maybe he (or she) is doing it as a side business, I don't know, might be a good idea to check with that member and see if he (or she) would work out a deal for some digital capable scanners, only one way to find out for sure. iirc at one point that member had a bunch of the Pro-668 models when Radio Shack put 'em on clearance/close-out last year so, it's worth taking a shot to see what that person might have at this time.
Basically you don't have much choice but to look at used hardware depending on the needs, and you can roughly expect to be paying just a bit more than $200 per unit but that's how it goes.
Good luck with the search...
(a quick glance at the
Sheboygan WI info does show the city/county system is now P25 Phase I so that's where to start looking... the system apparently went live only a few days ago which is probably what prompted this thread to begin with)