Low mileage Assetto Corsa, looks good, belts just done. I'd give it a look if I was in the market, got to be worth £25k surely, so asking price, minus negotiating room, maybe not too optimistic.
I've never bought a car that way. I know what I like, investigate, research, then just buy it. If I don't like it then it gets sold. I'd never buy on what the majority say, we'd all be driving something German and in white! ;)
Look for my thread on here, plenty of pics, but on a 3200, which I assume would be similar to the 4200. Good luck.
https://www.sportsmaserati.com/index.php?threads/assetto-corsa-refurbishment.36897/page-3
If it's similar to mine, then they run under protective covers/heat shields. Access from below. The originals will be plastic coated steel, so difficult to flare Insitu. Buy decent split ring spanners as access at the abs pump is tight.