This is somewhat technically challenging but worth the effort (it's all free too!).
What you need:
Firefox Browser (required for this to work) available here: http://www.mozilla.com/en-US/firefox/personal.html
Greasemonkey available here: https://addons.mozilla.org/en-US/firefox/addon/748/
Backpage image preview – Fixed available here: http://userscripts.org/scripts/show/68389
Install each of these in order.
Start with Firefox and then run it.
Install Greasemonkey next
Finally install the Backpage image preview. Make sure greasemonkey is turned on (look for colored—not black and white--monkey face in lower right) and browse to the link above and click install. Now you are ready to see Backpage the way it was meant to be seen.
Note: when you see something that catches your eye, click on the headline, not the images.
Speedy browsing!
