I buy to use, so that in using my knives I can translate what I have learned into my own designs. I picked up an Elishewitz Kaiser (I believe that is the model name) here in Damasteel, with G10/micarta/carbon fiber handle that has been one of my favorite users for bushcraft purposes, and it's list price is very much at the top of my collection. I like to get what I termed as "blue collar gold class" knives- those that look good and work hard. I have a new folder from Alan Davis that I can't wait to get in the bush to try out, not a traditional woods design but one I'm wanting to test out, and it is equipped with Damascus blade and amboyna burl handle scales. I don't foresee me ever selling my knives as I've watched too many sell their belongings to make ends meet and have regretted it forever, so I see no reason for me to not use more collectible knives if the desire takes me. Besides, me using my knives drives up the value for collectors that flip for profit due to increased scarcity, so users and collectors both win!