I have released Classifieds 2.53 Final today.
This is for Xoops 2.5.5 or 2.5.6
Please read the README file.
I updated the jquery for colorbox and bezoom.
I also removed jquery from the module, you must use jquery from the Xoops core.
If colorbox and bezoom are not working the fix is listed in the README file.
You can get the module HERE.
Any problems report HERE.