The success of resale businesses right now hinges on consumer costs, say the investors of 'Shark Tank'

• Mark Cuban invested $300,000 for 25% equity in the resale startup Retold Recycling on "Shark Tank."
• The cofounders are tapping consumer and investor interest in the resale and sustainable-clothing spaces.
• Here's what the cofounders learned about running a resale business on "Shark Tank."

Retold Recycling aims to reduce the 12 million tons of textile waste that Americans create each year, the company's cofounders, Alan Yeoh and Amelia Trumble, told the investors of "Shark Tank."