Hi,
Botanic & The Sanctuary is around 50%-30% cheaper than HK.
Botanic Body Firming Gel is good (of course Clarins or Dior is the best but need more $$$$), it cost around $100/bottle (quite big bottle) in Thailand.
No7 is around 20% cheaper than HK, but choice is limited. Whitening Essence in Positive action line is Ok.
Natural collection's 黃瓜小米草清涼護眼膜 is good for eye relaxation.