That is a fantastic find - congrats!
Wish I had garage sales near me. In my 'hood's "estate sales" I'm much more likely to find a gazillion old political books than one decent piece of camping gear.
I found a qualofill sleeping bag for $20. The owner thought it was down until I proved to him that it doesn't stuff like a down bag. Most garage sales don't have quality type equipment unless the owners don't know what they have.
I'm still looking for somebody selling their old inherited coin collection for $100 but worth $10k.