Hi Christian, sorry don't know a price, but the auto will give it a premium for R2 focus collectors and maybe autograph collectors too. I think AFA, for example, would actually grade it lower because of the auto. You could try checking out the autograph section on RS for more info?
thevintagetoyadvertiser.org 1970s and 80s vintage toy ads and other retro paperworks
imperialgunnery.com Vintage Star Wars action figure weapons and accessories guide