By no means a scientific study, just a quick look on Leboncoin....
'86 L - 5000 euros
'88 Clan - 5300 euros
'89 TL - 7000 euros
'92 4L 41000 kms - 8000 euros
'69 Plein air - 5500 euros
'69 plein air Sinpar 4x4 - 12000 euros
'65 4L with front damage - 10000 euros
'87 JP4 - 11000 euros
Top of the list, though I think it is a mistake:-
'84 F4 van - 16000 euros.
& to think that 18 months ago I sold a mint '92 44000kms ex-army gtl for 1500 euros!!!!!
'86 L - 5000 euros
'88 Clan - 5300 euros
'89 TL - 7000 euros
'92 4L 41000 kms - 8000 euros
'69 Plein air - 5500 euros
'69 plein air Sinpar 4x4 - 12000 euros
'65 4L with front damage - 10000 euros
'87 JP4 - 11000 euros
Top of the list, though I think it is a mistake:-
'84 F4 van - 16000 euros.
& to think that 18 months ago I sold a mint '92 44000kms ex-army gtl for 1500 euros!!!!!