The problem is its really tidy now after a lot of your hard work which most people wont want to or able to do.
Not sure on the miles, but you bought a 4 plate non cup pack 182 for 1650-
the wheels were battered, interior was mank, steering wheel fubared, knackered wheel bearing , & so on. & im sure things like tyres / service / belts are on the list as well. You have done a great cost efficient job of getting the best out of the car but to finish it & make it decent taking that same car most people would be well north of 2k to get it decent.
I guess it depends on what he wants - to buy a finished 'decent ' 182 that doesnt require belts & or loads of money spent or is lunar mileage is pretty difficult & then to go on & be satisfied with it on 2k is almost impossible ( unless like you you do it all yourself )
All in you will need the top end of 2750 to buy & complete a decent ph 2 172 sub 60k & nearer 3.5k for a FF 182 thats again really nice.
Thats not however to say he cant buy one for sub 2k & spend the time bringing it up to scratch like you did.....
s