What’s the best deal you’ve gotten on cars or parts

I bought three Dodge trucks at once from one guy. 78 1/2 ton club cab short bed 4x4, 79 3/4 ton reg cab 4x4, and a 76 1/2 ton reg cab 2wd long bed. All for 150 bucks. Sold the club cab next day for 500. The 3/4 ton the next week for 400. Both guys bought parts off the 2wd totaling another 500 between them. Few months later bought back the 3/4 ton for 150. Wound up being my first mud racer.