Goku/Vegeta sketch value?

Hello, I googled DBZ forum and they recommended I come here with my query.

Do any of you have any experience with cels or sketches from the show?

I've had these for YEARS hidden away and dug them out recently for a look, they are cracking and back in the day would have been worth quite a bit. The cel market has died a wee bit but I was wondering if any of you knew if these still had any value and an approximate value for them?

http://imgur.com/1Dcp8&wSFBp&gqZ1J&VtcBd&T5bev&5K96P

I actually forgot I had a rubberslug account! The gallery is long out of date and the only cel I have is the SSJ Goku one going mad so please don't message asking about any other, if you knew the value of that one though that would be nice to find out.