The cape looks good to me based on the one photo. I would ask the seller for additional photos of the stitching where the cape is joined and also of the lining if you're unsure.
I removed the live link and replaced it with the actual photo in your post.
thevintagetoyadvertiser.org 1970s and 80s vintage toy ads and other retro paperworks
imperialgunnery.com Vintage Star Wars action figure weapons and accessories guide