erm, departmental stores with toy sections. you can find those green or pink or blue plastic ones with plastic strings as well. they wont cost more than s$30
come on, can't you just tell him to use the 'Search' function instead of ridiculing him. anyway, you can search on Classic Sports, Artric, 10 and 10, Ranking Sports, Zenith, Gala, Chau Beng and others. I have given you enough info to search and find out the prices of the rackets you are looking for. Personally, I like Classic Sports at Toa Payoh SAFRA. Mr Soh, the owner, is a nice guy and offers good prices compare to else where.
just joking dawg. i dont know where the cheapest rackets are but i know Bras Basah Complex, Queesnway Shopping, Toa Payoh have several stores. they are all cheaper than retail outlets like World of Sports, Sportslink etc.