Unexpected profit - Should I give a kickback? - Page 4

One of the guys I regularly get scrap from has a business replacing water pumps, and tanks. About once a month he gives me a load of mixed scrap from his business. I estimate the weight of the load and give him half of the shred value. This leaves me with a decent profit after processing the scrap.



The last load was very small and only about 200lbs, so I gave him $10. One of the few items in the load was a submersible Gould's pump that he told me still worked. I looked it up, and saw that they sell for $700 new, so I put on the local classifieds. I stated that it was believed to be working but untested, and said make me an offer. I ended up getting $150 for it. Now I'm wondering if I should kick back some of the profit to my source, or just stick to our standard arrangement.

Thanks for your input, and sorry this post was so long.