I was in Kmart today and noticed that they have knocked down all the Grafix kits down to $3 a pop. The M1 Abram and the Challenger, whilst both pretty basic and not terribly accurate, they are good match, scale wise for 28mm miniatures. If you can be bothered doing a little work, that's a pretty cheap way to get a tank platoon.
The Mig-29 isn't bad and scales out to around 1/72. There are also a couple of vaguely useful speedboats. All of the kits come with a brush and four pots of cheap acrylic paint. Avoid the Spitfire it's a complete disaster. I just wish I could find the F-16 they make, none of the local stores carry one.
Worth checking out while they last.