I see you can buy it online U-I Oil (Wong Cheung Wah) - 1 Fl. Oz. (25 ml) - 1 bottle for $18.
Little too rich for my blood, if I were in the market for something, I’d probably go with Ben Gay or some blue ice type thing.
Suit yourself.
(I assume you checked Amazon? It’s a lot cheaper than that if you actually go to an online Chinese pharmacy - and you get a bigger bottle. And if you actually GO to a store, it’s even cheaper. Chinese Americans aren’t going to pay the prices that Americans do :-)