Found 9 pc of NOS Western Electric 300b tubes in an attic a little over a year ago, been sitting for decades. So yea, stuff is still out there.Also purchased a tightly matched quad of old Tungsol 6550 that were NOS from a friend at a bargain price, tested as new on a Amplitrex tester. They were in a box that was normally sold to bulk purchasers along with a lot more of them. Bulk purchasers didn't get individual boxes for each tube, just dividers in the box to protect them. He found them at a garage sale for next to nothing and was not into tube gear at all. Hence selling them cheap.I'm sure there are still stashes out there but they are getting harder to find.
BillWojo
BillWojo