Got to look at what's sellable?
Chassis? - If needs welding now, it'll need more next year etc, so is probably pretty bad...
Engine? 2.25 anyone? Yeah, right.
Panels - yes, if good, bulkhead £100, doors (lift-up handle I assume) £100/pair, tub £50, wings £50/pair, bonnet £50 if good, £25 if not, screen - no one seems to want them, hard top or truck cab £100-£250
Axles - £100 for front, £0 if rear is drum-braked
And that's about it, so I reckon Chris' £600 estimate is about right.