I've only ever known one experience with a debt collector (My dad runs a business and had to contract one to recover payments once) but he actually sold the deb

I've only ever known one experience with a debt collector (My dad runs a business and had to contract one to recover payments once) but he actually sold the debt to the debt collector. If the debt was $2000, he would sell it to the debt collector for 50%, the collector paid him $1000, and then ran off to collect the full $2000. So yeah if it was $15, you might be hard pressed to get a debt collector to care.