Didn’t know it was a big market. Used garments (smelly socks, underwear, bras) and bodily fluids (semen, poop, urine, breast milk) are very profitable not just for women but for some men.
Knowing that this site has some people with strange kinks, are any dopers brave enough to share their stories of making some transactions? 
Nope. Closest I’ve come was reading (for entertainment purposes) some of the auction listings for the stuff on eBay back in its early wild days before they disallowed them. I think it was one of the first categories of things to get a ban, in fact. People used to give detailed descriptions of “I will do this and that in these panties and immediately vacuum-seal them in a plastic bag…”
Now that I’m thinking about it, I think I mainly saw the listings because they’d pop up under “Weird items” or a similar heading.
Well, I do know that PayPal bans your account if you’re found out to be using the account for adult transactions.
Selling your poop and urine are very profitable? Where can someone sell their poop and urine? uhhhh…asking for a friend.
Any market for cat puke, poop or urine? I’ve got plenty of that.
No…unless you want to expose yourself to the risks of animal infections then I don’t think that’s a good idea.
You have to remember that people consume erotic products. Now, I know how weird poop fetishes are and I do understand that there are those with bestiality fetishes…however I would strongly caution them against consuming animal excrement, simply because of the deadly diseases and scarring infections that can result.
Do they really do that? That sounds very strange, why on earth would they do that?
Good point. Thank you, you saved me a lot of misery. Why don’t they teach this in schools?
They don’t. Why would they?
Can’t say that I have but apparently it is a fairly straightforward and lucrative business model.
“5 Weird Things I Learned Selling My Used Panties on Reddit”
There is also the Netflix series “Hot Girls Wanted” that features various women working in the porn industry. A lot of them are business oriented feminists and one of them mentions that she sells her used panties for $200 a pop.
Somebody is paying good money for that stuff. I wish that somebody would pay me $200 for my used drawers. Hell, I would even take $100.
Plus, you would be selling your DNA. Are you really comfortable with that?
With your screen name, you might get $300.
Seems like you’d want to stick with “gently used”.
This is how I buy all my condoms.
Huh, and here I was going to say I once bought a used book of erotica. I was a little worried about that, but the physical object (the book) was clean and looked like new.
Well I thought it was going to be a used vibrator or something - and no, I only buy new.
Sold!