I'll have a go at this. This is based on stuff I've sold on Ebay.
First of all, which I'm sure you know, the figures don't come with the sets, so I'll value them separately.
AST - 5 £20-30
Laser Cannon (if it has it's legs) £30-40
CAP-2 £10-15
Scout Walker £40-50
Jabba Playset...