value of a porsche 922 s2 cabrio

my father bought such a model over 12 years ago. first hand. by vw boss in koblenz NAJA wanted to ask you what such a cabrio without defects (no) and with only 68 tkm could still be worth on the clock. all inspections were carried out at porsche in koblenz. 8 times matured. only the color is somewhat used. ( starrobin red). looks like the famous barbie mobil Lach wahre r it is the model of the last series still without airbag. what do you think ?? about worth ???? images follow