Once MMC run out of V8 engines and move to a smaller, possibly twin turbo'd, BMW engine, then the V8 engined Trads and possibly the run-out and earlier Aero's could well become serious collectors items.
I suspect you are right about becoming collectors items.
As for the BMW engine - do you mean twin-turbo as in twin-scroll or proper twin-turbo as in bi-turbo
2010 Aero Supersport | 2017 VW Multivan | 1996 BMW M3 Evo