Hello Dan,
Not sure how much of this is going to be of help to you, and most points would come under the heading of ‘thinking twice’ before committing, but here goes:-
Have you actually seen the car, or are you just going by photos? If so, I would not be thinking too deeply about what are realistic and unrealistic offers until you are at a point of deciding to buy it. In-advance offers can seriously pee off sellers, and most will prefer to discuss figures when there is money on the table, and you actually want to buy it.
Getting an idea of what you will need/would like to get done is great, but be aware that sellers may not see that they should be reducing the price in accordance to what you want to get done. To be fair, you could be asking them to totally finance your betterment.
Investment, and selling on? I would simply forget that possibility and anticipate at least ‘normal’ depreciation, and just hope that it turns out that Covid does not have such an adverse effect on ongoing depreciation as might be expected.
Might be worth looking on EBay, and I think you will (as usual) find comparable, lower and higher priced prices examples.
If I understand it, the car has covered 7k miles since Dec. ( not insignificant in lockdown) and indeed he bought it since then, and has driven it 5k of those miles - presumably during lockdown. It could be me, but it hardly equates to ‘ not needing’, during his very short ownership.
I would be interested in how long the owner prior this one had it. Important to know, since two short term owners can equal problems.
‘...my Pre Purchase Inspection...’. Can we take it that you will be inspection the car yourself, or you will be getting it independently inspected.
Service and belts at 108k but no invoices, or bills for parts? I would tend to read this as simply some verbal attraction to sell it.
Just some thoughts Dan, but thinking twice doesn’t usually cost anything.
Good luck with whatever you decide.
Kind regards,
Gareth.
p.s. Service history can be important, but can equate to the car having spent half a day at the dealers, have oil and some filters changed, and may, or may not represent how the car has been cared for by the owner.