Thanks for your input
The guy selling it seems genuine, and as far as we can tell has been brutally honest about the car. Having owned a 230 before we bought the 280, we are fully aware of the rust issues that can plague them, and the other cosmetic issues they have, all of which can be sorted out. Selling the 280 should leave me with at least 4k to put aside for future expenses, even after I've bought the 32. The common consensus seems to be that the engines are fantastic, and as mentioned good for at least 150k miles, and this has 66k on the clock, which is lower than any of the ones we looked at a couple of years ago, but just couldn't afford then.