The cheap On30 is still there, only the prices have changed so it's no longer so cheap! When the freight cars first came out, the list price was less than $15 each, and the street price was even less. I bought a few box cars and flat cars for $8-$10 from one of the mail order dealers, but unfortunately those days are long gone. I guess now that there's a market for On30, it no longer needs to be low priced!
On the other hand, there doesn't seem to be many low prices on eBay for much of anything anymore, most all the vendors seem to think their old AHM, Tyco, and Model Power items are worth their weight in gold...
Bill in FtL
