There are so many thing. As i am A1 customer of Aliexpress and buy a lot of thing every now and then but it totally depends on you what you want to buy.
If there is anything that you have in mind just search for it on Aliexpress and you will have hundreds of stores up with those products. You will have different price choices and what ever suits you best, you can choose from them.
In my personal experience, there were so many cool things such as Shoe with LED lights because i love dancing and always great to hit the floor with nice dancing shoe.
Another thing was the suction Hydra faction tool for blackheads and another was face slimming and massaging kit which was quite cheap in comparison with the treatment you get from your cosmetologist.
As i mentioned, totally up to you what you want. I love makeup, jewelry, dresses, shoes, and all type of accessories so i mostly buy them but there are many cool Gadgets also available all you have to do is go, search, select, and buy.
