I do. For many things. I grew up impoverished and old habits are hard to break. My EDC fixed blade is a $20 dollar S&W fighter from Big 5 in a repurposed sheath. The original sheath went to replace the trashed one from my treasured Ka-bar which has seen hard use in a lot of places. It was a gift from a greatful Marine so it has more sentimental value. The S&W takes the place of one of a blade of my own making. I would buy second hand clothing if I could find any that fit. So yes cheap to protect the good is an excellent practice.