To late to offer purchase advice.. but
Rear wheel bearings, seems to eat them for lunch
Rear shocks, specifically the top bushings, again, eats them
If you can get rubber caps for the front strut tops as they collect water, it sits and rusts.
Get under it at very least once a year, they have a nack of holding road mud, rubbish in the sills, rear wheel arches and other not so fun places, in a few years rust is going to be a BIG issue with these abarths.
Map it, the 135 is disappointing, the best thing we did was put a bombardier exhaust and remap the car.
Other than that, the boot lid has a nack of chopping the loom in half, and the brakes are underpowered for a remapped cars, upgrade and service the rear calipers at least once a year as they are crap and like to get stuck.
Lots of neg in the above post but ours was pretty much as easy to live with as any fiat 500 apart from a tiny fuel tank and the turning circle of a tank....
Thanks for your comments and advice. Unlikely to be remapped, as came from 69bhp to now 135bhp, so she happy with the power. No knocks of clunks in suspension, struts top mounts front have caps, under them like new. Brakes front and rear have been upgraded, why, we do not know. It’s been garaged during its life. Spare wheels with winter tyres was a bonus. Ride on 17” wheels not too bad. Turning circle interesting, just like a Coop. Previous female owner chopped it in for a Maserati Gran Turismo.