eBay is also where to go for the Lindberg tanker (released as "US Navy Tanker", "Fleet Oiler" and Tehachappee, IIRC), but for that one you'll wait long and far between - and then compete to pay a high price.
If you're interested primarily in recoverable hulls (as I often am), look closely at eBay pics of "boneyard" collections being dumped for cheap. Sometimes an old Lindberg or even (more rare) a Renwal or two will be thrown into the jumble, the seller having no idea how rare those old kits really are, and you could pick them up, with the entire mess, for under $30 or so. (I've often considered asking a seller just to throw out all the rest, to save on shipping! )
What are you thinking about building next, Ron?