I might as well add my current thoughts to this thread.
1st- As far as the market prices for Schrades reaching significantly higher levels - I think that is 40 - 50 years down the road.
Look at old original New York Hammer brand knives - they were a higher quality knife than Schrade - haven't been made in 70 years,but they still haven't reached stratosphere levels.Why?-probably not enough on the market to make it possible to collect them,among other things.
2nd - Good old eBay has a way of killing local collector value! When people see high prices being paid for an item,they scour their attics,stash boxes,etc. and put them up for sale.
I used to have a big collection of gun,African hunting,trapping,and old west books and in 1998 I decided to get rid of some on eBay.
I had several by Will James - an old cowboy who was a great artist and wrote many factual and riveting books on the old west.Some I sold went for well over a $100.
Today,you can buy the same book on eBay for $20 or less.
Remember,there will be more sellers than collectors!
3rd - Today's generation doesn't value quality tools.They buy anything that looks good and is cheap.
You old timers also have to aware that when we cash in,stuff we value highly and know the value of,may be sold for a $1 at a yard sale by our heirs.
I agree with Paul - the NIB items with original paperwork is most likely to appreciate.
Ron