Some years back I used to have a table on Hitchin market. A chap I'd known for many years would come & see me most weeks as I would find him bits & pieces that he collected, he liked vintage advertising items, local postcards, etc. On my table I had a couple of boxes of records and one week he said he had some records in his loft. Every now & then I'd ask him to bring them along, he'd then reply with "Find me something I want & I might do". Anyway, one week I'd found about 8 or 10 old local postcards & I had them at the back of the table. He spotted them & he really wanted them. I agreed to keep them for him until the next week to give him time to go in the loft.
Next week he was there early in the morning. We went over to the car park to his car, he insisted I take my few postcards with me, and he opens the boot up. I nearly fell over it was full of boxes of CBS demo's ! I asked him how he'd managed to get them ? He said he worked for CBS from the mid 60's, he told me he pretty much ran the whole thing. I only got a few records in swaps for the cards, so I asked could I buy the rest ? No you find me some more trades & I'll put them back in the loft for now he said. That was about 12/15 years ago, I see him a couple of times over the following year but not seen him since.
I'd rather not say what I managed to get in swaps that day, but the important thing was we were both happy (-;