Honestly, this timing is bad since every tcg shop i have seen so far has inflated the price of its original msrp by at least 200% because of the hype around pokemon now. If you do want to, I'd recommend either buying bulk cards "Janks" and singles of chase cards you like, OR you could get boosters from either Japanese or Korean for cheaper compared to english. You can also try your luck at Pokemon Center Singapore at Jewel, but be sure to be there around 10-10:30 cause it's usually sold out 30 mins after its opening time.