I would think around 20k as everything is there. The expensive stuff. Interior looks good (big bucks can be spent retrimming), gts mirrors, no wheels but the ones are worth as much as a set of restored gts rims.

Windowless, nice colour, 308, manual, black interior, aircon

If you are just left with minor body and a nice fresh respay you would be getting a rally nice van for under 30k.