scavenge + salvage-- scalvage. To find items meant for both purposes! Kind of a "fregan" concept but even my capitalistic father engaged in this.
For many years my dad would scalvage all kinds of craft materials at industrial sites near our house: carpet samples, wooden moulding parts, pieces of formica, vinyl samples. He would also find old chairs that were cast away and fix them up.... so I began to do that too. You can make craft products and even furniture (or rescued furniture) from your findings!
Scavenging trash or cast-off items for the purpose of salvaging it and applying to a better purpose, a more legitimate use than merely "free stuff" - improving the item's quality through its new purpose or new, second "life." The new use is different and of better quality (substantively different) than the item's original use or purpose, i.e., a chair that becomes shelving or artwork, a pallet that becomes a gate or fence.
A mix of a sco and a savage. In other words, someone who is a beast and a pro at getting some of your stuff. Beware when you have lots of items such as say... Chips, French Fries, or candy or other scoage