All Classified forums require a Site Supporter subscription. It is only $25 per year and you can buy and sell whatever you like on the forum. To become a Site Supporter, go to Your Profile and select "Paid Subscriptions."
I wouldn't leave it off. After some time the rear bedsides will get loose and crack. Look at the tailgate latch it has tabs that hold it tight. I've seen quite a few beds get ruined back in the pronet days.