Besides proof sets for collectors, Singapore Mint have also produced Uncirculated Coin Sets (different from Proof sets) for sale to the public. These coins are normal coins that you can obtain from the bank, but are not circulated. Before these coins had the chance to be issued out, they were packed in sets for sale by the Singapore Mint, often at a small premium. For the proof coins, they are uncirculated coins which are specially polished to a shine. Thus, under some careful comparison, one can discern a proof set from an uncirculated set.
However, for collectors who just want a normal set of nice looking coins at a low price, they can consider buying these Uncirculated Coin Sets. The coins are brand new, and sets are as affordable as 8-10 dollars per set.