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?
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Paul F,
thevintagetoyadvertiser.org 1970s and 80s vintage toy ads and other retro paperworks
imperialgunnery.com Vintage Star Wars action figure weapons and accessories guide