Be patient! Some traders are just slow. I had a similar trade via PinPics earlier this month with a local trader here in southern California. The trader wanted to exchange pins at the DLR PTN. I declined, knowing how hard it is to find an unknown person inside the PTN ballroom. I mailed the pin with the tracking number, but no reply from the trader. Tracking showed the pin arrived but no email from the trader. I sent emails asking about my pin. Finally twelve days after the PTN, the pin arrived. No email from the trader when the pin was mailed nor a tracking number. The pin envelope showed that it was not mailed until ten days after the PTN. So, it wasn't the USPS' fault, but the slowness of the trader.