Quote Originally Posted by rabernet
Plugs don't necessarily guarantee anything either - the last female that I picked up, another member here passed by, because he thought she had sperm plugs (we buy our feeders from the same pet store). Seems females can also secrete and give off something that could be mistaken as a sperm plug. I popped AND probed her (3 scales on each side) as female.

I've got someone offering me a free adult ball python, but I don't need a male either. Debating whether I just meet them, sex it - keep it if it's female and re-home it if it's male, they are desperate to re-home it themselves. Wanted $100 for it, then $50 and today I get an e-mail going "we need to find a new home for this snake, and since you have experience with them, we'll give him to you". They don't know if it's male or female, they've just assigned a gender to it.
That's almost identical to the situation I've got. If I can definitively know that this is a girl, the price is a steal and I'd be a fool to pass it up. Heck, I guess even if it's a boy I could probably rehome him with little difficulty.