gshock...ringtones from zedge are absolutely FREE!! I use that site ALL the time! How did it cost you $15.00?? The things with a lot of these sites is that, people click on things they shouldn't click on. On sites like Zedge or Funformobile, you SHOULD NOT click on anything that says "DOWNLOAD RINGTONES FOR ATT" or any of that stuff. All you need to do is search for what you are looking for and take it from there.

I would suggest if you are going to download ringtones/wallpapers from any site, you should get a data plan, even though it is not necessary. If you are unable to download them straight to your cell, due to not having a data plan, check Zedge from your computer. You MAY be able to download them to your computer and transfer to your memory card from your pc. 

Also, if you manage to download them, remember, some phones will only let you use a ringtone that is 300 kb or less.