It was not a difficult decision.
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I found the whole process to be surprisingly straightforward -- I get paid upfront by an interested party, usually via a Visa/Amazon gift card, and once I receive the payment and the customer's address, I drop my vacuum-packed underthings in the mail and send the buyer a tracking number. After they receive their purchase, they can post onto the forum with a review of my dirty laundry, and I can review the buyer. The whole system is so smooth that it's easy to forget this trade revolves entirely around people paying top dollar for crotch stains.
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Now, selling your dirty underwear to random people on the Internet does have its risks (it's kinda-sorta sex work, if you're flexible with the definition). There's always the chance of running into creepy clients who get obsessed with you and try to take things a step too far. I take as many precautions as I can -- I have specific Reddit and PayPal accounts that I only use for selling panties, and I never put a return address on the packages I send out. If I used Craigslist and met my clients in person, who knows, maybe I'd be hidden inside several old freezers by now.
Luckily, none of the buyers I've sold to have ever set off any "terrifying stalker" alarms in my head. For most of these guys, the anonymity is a big part of what's exciting. They want to get off on random women's underwear, not get our phone numbers and friend us on Facebook.