Just thought i'd thow in a bone here... the local michales and A.C. Moore craft stores here almost always have an endcap with the "cheaper" end of art supplies on sale or clearance.. just the other day I was thinking of getting a box of pastel chalks think it was a set of 36 marked at $5.. but thought i'd wait a bit and see if they got cheaper.. (not that I really need them)..
they also sell cheap artist oils, artist acrylics, and artist watercolors that way (all in the tubes..).. the oils are cheap and prob not worth it.. but I've got some nice results using the artist watercolors as washs.. ( and the best thing is if you don't like it you can remove it fairly easy without damageing the paint under it..