Although recommending this site will result in less stock (theoretically), fyi you can find some good deals for new 1000 piece puzzles on eBay 🙂
As far as safety, I’ve been spraying the exterior packages (and puzzle boxes too) with Lysol and let them sit for a few days.
Target had some good puzzles by me, and the good news is that the store has been getting more puzzles in stock weekly. However, the last time that I went to the store (when I also needed food), all of their adult (over 300 pieces) puzzles were sold out. Hence, I’ve been scrounging around online.
Btw, my friend saw some puzzles at Joann Fabrics the other day, but I didn’t ask her how many pieces in a box.