Bandai is going to reissue the 48th scale series. Prior to this and before the mainstream "rebirth" of 48th scale by Tamiya, Skybow, et al, they were very collectible with most US armor and some German and Allied kits going for quite a lot of money on eBay.
Frog/Fuman in China reissued some of the kits like the Willys Jeep, M4A3(76), Hetzer and others back in the 90s. Because of this, it dropped the price of the original Bandai issues of the same kits. Eduard even did PE sets for the kits that Frog/Fuman reissued.
The kits were pretty good for their time in the late 70s. They had relatively complete interiors and pretty good detail and fit. The scale just did not catch on, they had the misfortune of coming out about the time Tamiya moved from 1/48 motorized kits to 1/35 and Aurora went out of business (the main 48th scale armor company of the day).
Here is a site with good information and links to 1/48 scale armor:
http://www.track48.com/