what should i get from the US?

im traveling to the US this december and wanting to buy some hard to get/US only stock of makeup & perfumes!! any ideas for the best things to get from there that we can't get here (or might be extremely marked up here)? going to check out the sephora and get heaps!!

im also open to ordering from US websites if its not a physical store and getting it delivered to my US address. not sure which ones are good for that though so let me know if you have recommendations :))