My wife and I always work to get shipments out within a day, especially this time of year.  While I have great success in packages making due time, please be aware of the impending back-log that might affect shipping times via USPS.  Priority might help, but there is no longer any guarantee.  The closer you are to the seller's zip code, also helps, but most mail is being trucked these days due to lack of flights.  This will be the case through December 27th or so.  

As my family works primarily with collectibles, the above may not be an issue as collectors collect when the collectible becomes available, and not so much because of specific holidays.

Thank you for your understanding and patience.  Most sellers on Ebay are still "small business" or hobbyists who are victim to the shipping debacle as much as a buyer might be.

BUT, if you are trying to get items (from anyone) to you before Christmas, whether first class or priority, please note and take into consideration they may not make it in that time frame if purchasing now.