IfranVIew has a very good feature when saving JPG files. You can choose the exact amount of compression you want by adjusting the slider bar. Move the slider bar until you are at 80. In my tests, a 1MB ( 1000000 bytes ), TIF file saved as a 28 BYTE ( 28000 ) JPG file when saved at 80, and there was virtually no visible difference between the two files. Perfect for eBay. Also check the SAVE PROGRESSIVE option. This saves "slides" of your image and when dowloading to your auction will start with a low resolution image and fill it in with higher resolution as it continues to download.

Click the OK button and then click the SAVE button in the SAVE AS window when it pops back open.

I will not discuss the other options here as we are just concentrating on the basics of saving as a JPG.