I stumbled across Park.io, a drop-catching service for .io domain names, and purchased PHP.io for $1,655, thinking that it would be a great domain to sell on the technology- and entrepreneurial-focused marketplace Flippa.com.

Within 30 days of my original purchase, the domain name sold for $6,000. I invited Park.io founder Mike Carson on the show to help let you in on my secret, even though I’d rather keep this terrific resource all to myself.