I'm pretty much going to echo this. I think the distinction we are talking about is whether or not a person advertises an item in a for sale thread that they plan on selling many of, or are manufacturing for future sale with out the vendor status.
First I've seen this thread. If you put stuff on your bike and don't like it and want to sell it go ahead. I personally will not delete your thread. If you buy an item and decide you don't like it and want to sell it before you even mount it. Go ahead. I personally wont delete it.
But... if you order a bunch of stuff in bulk and then post a bunch of items up for sale. Like a vendor would. And you are not a vender. And a member brings it to my attention. Then yes, that is the type of thread I will personally delete.
Keep in mind, even with all of this, I need to hear a complaint from a member before I will delete that type of thread.
But that is just me. Can't speak for anyone else.