I've seen them on eBay. But they always sell too high for my taste. Might be worth it though if it was the very last knife on my checklist...
So you've found every other Old Timer model? That's great!
I'm still missing a few of the regular Schrades, two of the Ulsters, and one of the Primbles. I have none of the Schrade Old Timer Classics and none of the Grand Dad's Old Timers. I don't intend to collect the Safe-T-Grip Old Timers, but I may change my mind.
-Bob