Tight to open wouldnt bother me, but I would want to know if it was so because of forearm pressure. If they wouldnt drop the forearm for me to check, I would at least want a no questions asked return policy. Unfired return would be OK for me to do the check-up at home for the critical issues. If they wont allow that, DO NOT buy from them.
The sights mounted crooked are just plain wrong. Point it out is about all you can do, but I cant live with that always looking back at me when I look down the barrel.
Now if you intend to put a scope on it anyway, use the sight issue as bargaining stock if all else is OK, but know that if/when you go to sell it the shoe will be on your foot.