Hi Hanyeu's right, I can't remember the exact pricing, but it was definately under NTD40000. From my memory, Singapore and Taiwan have similar prices, the differences are very little and depending on the exchange rate, sometimesTaiwan can be more expensive.
However as a foreigner, you get 5% VAT back.
Just to give you an idea how much things cost here, a twilly is NT$5000, 90cm scarf was NT$14300 (the last time I bought one was in Jan), and Kelly Wallet in chevre was NT$99700