Probably not much. Other than the black market, it's whatever is available in the state stores. They used to trade a lot with the old Soviet Bloc nations, so there might be some Russian or Eastern European products available.
Also Mexican and Canadian products, since we're doing business with them. I remember ( 10 years ago), I got a shave and an haircut for 2.50USD I gave the guy 2USD as tip and a brand new Mach3 (The blue edition). The only cuban aftershave is Rhum, ask her to bring you a bottle of Caney or Santiago.