What did you buy? Flashlights?
If in a hurry, opt for Priority, which takes about 6 biz days. USPS Express has very accurate/updated tracking, something like EMS but slightly faster....takes only 3-4 biz days. BTW when they sent the items does not mean it is collected and brought to a major sorting facility which in turn would be near the airport and brought onto the next available flight. USPS is very secure, you will not lose your stuff, unless you gave wrong address.
Sometimes for China stuff, your stuff might be brought to Customs there for checking (cursory type lah) before boarding a flight. So really depends.
For electronics stuff, can try Aliexpress. Find it really good. I even got 3 refunds and it was INSTANT refund after approved by seller which you can check beforehand by contacting them (also most of them contactable via Live Chat coz same Time Zone). Coz it uses ESCROW, not Paypal protection.
On the whole Ebay is more expensive by about 20-50% compared to Aliexpress, Manafont, Focalprice etc.