I understand the appeal but do yourself a massive favor and buy a scanner.
If you need help setting it up, you lack essential knowledge required to make it a truly "safe" scanner and thus should not do it.
Buy a scanner. Stay out of legal trouble. Easy.
While I am inclined to agree, there are those that have invested a couple hundred $$ to over a $K in these surplus radios.
As long as they are available and programming software/cables, People will buy.
Most of those just don't have the funding to invest in scanners with the similar abilities over the cost of surplus radios.
SO, sitting there with a radio in hand and thinking [Why spend more money on a scanner]
I have a hundred radios acquired over a couple decades, a rack of programming cables and gigabyts of software.
My cheapest setup is radio dongles and DSD+FL that will monitor PS from city to government. That is what I use.
50+ years working in radio engineering, 20+ of that directly with LMR and I needed help programming some of these newer
surplus radios.
People that ask before splurging, I would suggest a scanner or SDR setup.
Cheers.