Suspension Noise problems of the 2006 Mazda Tribute

I heard a banging sound coming from the back of my vehicle only to discover that the passenger right side wheel well had completely rusted away and the rear suspension was banging around, I could actually see the bed lining of the vehicle scary when your driving around a 3 year old! I brought to a frame shop and was quoted $2500 for repair and basically told to scrap the vehicle (very disconcerting when there are only 140,000 miles on it),. After researching it sounds like this is a very common problem in this vehicle and I am hoping that it is addressed with a recall. I did end up finding an auto body repair shop to complete the repairs for $800 who told me he is seeing many drivers with this exact issue with this type of vehicle. After taking the back end off he said that the other side is about to go as well. I am now stuck in an ethical dilemma do I sell to another party to get my money back on a down payment for another vehicle or do I junk this vehicle that is unsafe and take the loss so that this doesn't become someone else's problem. Thank you for any help you can give me with this issue!.

While driving on the highway I hit a bump. After this bump there was a loud banging sound from the rear of my car when I ran over any other bumps in the road. Upon inspecting the sound I discovered that my passenger side rear suspension had rusted completely away from the inner wheelhouse where the suspension was wielded to.