I wouldn't worry about the base too much.. I've seen a few with the same marks including my own.. yours doesn't look so bad.
The teeth I'm not really seeing anything ..What's wrong?
The brown spot however would bother me and I'd ask for a replacement, if they still have any.. But not sure how replacements work with international orders.. you could definitely I would think get a $40-50 credit. You might want to try rubbing out the spot first.. I've come to learn that paint rub usually can come off.. take a microfiber cloth and see if it rubs away.. some people use Mr clean magic erasers but I've never tried that before..Its a little more harsh. I've had really good success removing spots with just a cloth, start off gentle and work your way rougher if you notice no effect to the yellow. But perhaps see if they will send a new body first.. you would probably need a new base as well to ensure everything fits correctly. Either way definitely contact them, worse case you take a credit. Or if it bothers you that much return him for a refund.