Rough Price: $3-$5 per tape roll
Functional and cool to look at, these wallets can also be tailor-made to any video game a person enjoys. While these are cheap to make, only requiring duct tape, scissors, and a ruler, the limit here is how detailed you want to be in your design. More detail means more types of tape will be needed to make those intricate designs.
You can get the tape from just about any store and the wallet is incredibly easy to make.