Personal opinion: There is not a better all round general aviation airplane built.
Some of the good points about 182s in general:
1. Great space, comfortable cabin. Good ventilation and heater.
2. One of the few GA airplanes that will allow you to fill the seats and the tanks at the same time.
3. Good range with 78 gallons usable (75 gallons if you believe the AD.)
4. Decent speed. You can flight plan 135 kts and be comfortable about making it..
5. Very stable, good IFR platform, if you are interested in that sort of thing.
6. Good airplane for high elevation airports.
7. Decent short field capabilities.
8. Reasonable fuel burn – no wind ~13 MPG (a 150 gets around 16.5 MPG)
9. Insurance not too bad – should cost your $1200 to $1500 per year.
10. Annual inspection not too bad – around $600.
11. There is a good steady demand for 182s and they hold their value better than some other complex singles.
Some of the bad points about 182s in general:
1. All 182s are nose heavy with one or too up. Put 50 to 60 pounds in the luggage compartment and that will fix the problem.
2. After flying a 150 you will feel like you are driving a truck. But you will get used to that in a few hours. And you will appreciate the stability when flying cross country and a better ride than a 150 in turbulence.
3. It is harder to get out of and into the hanger. An empty 182 will weigh more than a 150 at gross.
4. If you do much of your own maintenance you will find that removing the lower cowl is a bear and you have to have help to put it back on.
All around the 182 is a well balance (capability wise), very capable and reliable airplane. It does not excel in any aspect but does everything pretty darn well.
As for N21PV it seems to be pretty well equipped with reasonable time on the moving parts. The airframe is probably about average for its’ age. The price is in the right ball park, looks just about what I would expect.
Just a couple of comments on the equipment. The listing does not say whether or not the Century I is coupled to the nav radios. It is a really good unit. I have had a couple of these and they both had an input for coupling. If the plane does not have a heading bug on the DG you will want that too.
I would loose the flap gap seals. I flew one with gap seals and hated it. The flaps loose efficiency when air can pass over the flap. With gap seals the flaps are more like speed brakes than flaps.
If you are going to be doing any serious IFR flying you may want to think about getting a second Nav radio. For a while you will still need to find intersections that are defined by the crossing of two VOR radials and while it can be done with one nav radio it is a bear and more work load than I would want to content with.
No there is no 182 that is analogous to this one. Again personal opinion; there is no type club that is analogous to this one. The closest thing that I have found is the Cessna Pilot’s Association (CPA). They have an active and lively 182 forum but it deals primarily with technical issues.
Hope this helped. BTW if you haven’t guessed by now I am flying a 182 and it is my second one. I dearly loved my 150 but my wife hated the itty bitty cabin (when Mama isn’t happy nobodys happy

Good luck.