Originally Posted by
MDFFlyer
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If the seller is Amazon, they mainly ship with UPS, so if you're lucky, everything will be partitioned with UPS, though Amazon does occasionally use US Postal Service or Fedex.
I order lots from Amazon and less than 25% are from UPS. USPS, and Ontrac are more common. Since Amazon has so many nearby warehouses, they can often deliver in 1 day via these services as normal ground service.