I guess you can just give up that idea if you are refering to the street near the Taipei train station, beside NOVA and a big shopping mall. Tha prices there are about the same as in singapore when i was there in end 2005 and beginning 2006. At that time the rates are like 1:20, and some lenses are infact cheaper in singapore when i ask around in taipei. Prices of photography equipments in Taichung, Tainan and Kaoshiung are basically almost like singapore, but i find that singapore sometimes are cheaper. Did not ask about the tax rebate though.