During that era I went over to Neuvo Laredo to look around. It was hot and I was thristy, so I got a glass of something sort of like lemonade from a street vendor. I gave him a US dollar, and held my hand out for the change. He put a few coins in, but when I still had my hand out he added a bunch more. I finally waved him off when I had a collection of odd Mexican coins. The whole pocketful was probably worth 5 cents but I'd have paid a buck for the glass of whatever anyway.