Pedal box

[R7EBO]

I have just bought a pedal box from Fleebay which was advertised as 'Grade A' condition, and a 'very very clean' item. Low & behold when it arrived it turned out to have a fair amount of corrosion. It is however complete with all the gubbins, even throttle cable is still attached.

Question is, how much is a used pedal box worth? Can you still buy new ones? Could do to know before I start moaning at the seller if it's worth the £257 I paid for it, or if it's worth spending the time to spruce it up?

Thanks!