I got a Gold Account just so I could use the Show Lower Price thing in my shop, but when I clicked where it says "Show Lowest Prices" it just reloaded the page with no changes. Do I have to do something special or did I just waste me CSC? I really don't want to have to look up the prices for all those items.

Did you active your gold account medal or is it still in your inventory? You don't have a gold account right now. The little person icon next to your username would be gold, like it is on mine.

Found the medal, thanks. I didn't realize I had to activate it, thought I just had to buy the account upgrade.

You're golden now! Have fun. :D