Well, here's a thread that might be helpful. It has a couple of ventral shots of GBB slings. Although they are not confirmed via molt, I'm fairly confident the top is male and the bottom is female. At the very least, a clear difference can be seen. Which one does yours resemble?It would be awesome if someone with a confirmed female sling would post a ventral shot on this thread for comparison. How much would two male gbb slings be worth if they are really both males?