Yes I agree, some nice MOCs.
This isn't my best area as I do nit collect ROTJ MOCs but here are my valuations.
I would like others to chime in especially with the Chewbacca.
Biker £200
Vader £175
Jawa £220
Chewbacca I think (sorry if I'm wrong) that this is a TT, if so what ever anyone will pay, but suspect it would be around £150 area.
Please get some more opinions on the Chewbacca.