So I received an item that I paid for 'USPS Express Mail' @ $16.50 for in the auction, then the seller messaged me saying he used USPS Priority. So far so good as he let me know of that switch before paying. I got the item today and it cost him $6.46 to ship, which is seeming much more like USPS First Class. It did however have a tracking # (starting in LC ending in US), which I didn't think USPS First Class came with. I just wanted to figure this out before messaging the person. US sellers charging for USPS Priority (usually starting around $15) and then using USPS First Class (starting around $4) so as to pocket the difference is becoming way to frequent for me and really pisses me off (or even worse switching to UPS). As does the "what, you got the item in the end and that's all that matters" responses.