Granted with your fico and income you could get another card with a lower interest rate, no fees, etc no problem. But the issue with that is history.
In all honesty as rediculous as the AF and the rates are, put $20 a month on the card, pay it off and keep the long standing history on your bureaus. The long history is going to help you more than having another card only open for the past 6 months with a higher avail balance.
Once you finally get the car you are going for, or whatever your goals are in the next year or two then cancel it out, but as minimal as it is right now, I would keep it open just to show that you have a long withstanding payment history instead of look I got a CC 2 months ago.