A mid 80's base model 205 isn't worth squat today 30 years on, so if you live on a suburban estate with limited garage space, I wouldn't be storing that for a decade the hope it will be worth a ridiculous amount.
Granted the mileage will still be low as I gather you don't intend on using it, but I just can't see a market for it in years to come.
Sell now as a useable, low mileage car with a ticket.
All IMO of course!