Please resize your images to a smaller file size so they don't waste server space.  Each of those images are over 3MB.

Here is an example:

The first image is 3264 x 2448 pixels making it over 3MB.

Here it is simply resized to 1024 x 768 and file size is only 150KB.  You can see that there is no loss of quality. 

The forums automatically shrink the picture to fit the forums but the file size just wastes server space.  So, we appreciate you resizing before attachment.   

I don't understand how that would be possible.  File sizes are uploaded at whatever size they are when you attach them.  Maybe the 540KB one was a thumbnail?  Your Solus pic on the Classifieds forum is 540KB....Not these pics...

You can use a program like IrfanView to edit and resize:

http://www.irfanview.com/

It has a lot of cool features and is easy to use.  Resizes maintaining good quality.