Mike DelGaudio

Picasa is a great tool to make sure your photos are just right for Ebay Auctions.
If you don’t have Picasa,

The easiest way I know how to resize images quickly is to use the
Export feature. Here’s How:

Select each picture you want to include in your auction and click the
“Hold” button at the bottom to keep those pictures in the “tray” area
in the lower right.

Then Click “Export” in the lower left (or File | Export Pictures to
Folder”)

The ‘Export to Folders” window will appear. In this window you can
select where you want the adjusted images to go, and you can slide the
“Image Size options” slider to a resolution that works for Ebay.
Generally images smaller than 640 on the longest side will get you to
image sizes that are “Ebay friendly.”