1200 SGD I believe for Photoshop 8 CS. (correct me if I'm wrong folks)...
In reality for domestic use any version of Photoshop from v4 to CS will do fine as well as Photoshop Elements, LE (Light Edition) etc. Other good alternatives are JASC's Paintshop Pro (120 USD), and the freeware GIMP etc. Check on CS for a recent thread about good freeware or low cost Photo editing software.