There is nothing wrong with buying knives to use and then using them. How else can you truly appreciate their construction and utility? I don't know many collectors who don't also own and use knives. Myself, it has been my habit to buy a user of almost every new-in-the-box knife I add to my collection.
I use Schrades daily in my work. And I keep replacements on hand for when they get lost or broken. I give them as gifts to friends and family.
One of the attractions of Schrades (and Imperials and Ulsters etc.) has always been that they are well made, well designed, useful knives at affordable prices. As it was when ISC was still in business, it remains so. The limited edition and low production knives are interesting to examine and collect, but most of the patterns were made in such quantities for so many years that they remain relatively easy to find in whatever condition desired and inexpensive to buy.
Michael