Usually custom pins are traded 1 for 1. However, if you have a highly sought after pin you may be able to trade 2 or 3 for your 1.
Some things that make your team pins have high trading power would include spinners, custom pins with glitter, sports pins with dangles, blinkie lights, neon colors or glow colors, and bobbles. Also, the larger the size of the custom pin, the higher the trade value of your team sports pins.
Pins that have dangles are attached with a ring. The average dangle size is 0.5 inches to 1 inch. For custom pins that have dangles with print on them the larger sizes are needed. Custom sports pins can have dangles that are baseballs, softballs, bats, mitts, your state, a phrase, soccer ball, football, or something specially custom to your custom team trading pins design.