I had a deal when I was younger many years ago with the local Sports Authority to buy the Tippmann 98s that customers returned.
It saved them money from having to throw them out and label them "defective allowance".
I got them for $70 each. The manager would call me each week, and ring them up for me at the register when I came in to pick them up.
90% of the guns I took home had a broken ball, paint, or shells pieces stuck in the breech or bolt. I took them apart, cleaned the break, re-assembled them, and sold them for a nice profit.