"...I'd repop any females you have before you sell them to make sure you didn't mis-sex them..."
ALWAYS - great advice! I actually re-sex EVERY baby before shipping or before setting up in a bigger cage if I am keeping it. Sometimes I find I have mis-sexed it, and occasionally I find that I stuck the wrong sex labels on the babies in a clutch when I am setting them up in mass at hatching time (I pop them before they eat). Doesn't happen often, but occasionally.
And I re-sex EVERY baby I buy! I don't care if it came from my best friend, or from the best known name in reptiles! Anyone can, and will, make a mistake now and then, so I want to be sure I have checked it for myself. If it is wrong, and I find out months later, I want it to be MY mistake, not one made by somebody else.