Also depending on the weight. Last time i sent gauges they sent it back because it was "too heavy" so it required another stamp....but they stamped my stamp so i obviously couldnt use it lmfao. Waste of stamps. A stamp book cost a lot too!
Do you take PayPal? And don't send stuff in just a plain envelope with a stamp, it's way too easy for it to get torn and the stuff to fall out. A lot of people here know that and will beg you to do that and then claim they never got it to get a refund. Be careful!