The line to the air suspension is broken.
You will get sway while driving & alittle more bounce on that side. But when on the hwy. doing 55+ mph if a tractor trailer passes you will feel much more of the sway. Depending on the bag you want to replace installed maybe up to 300, just a guess. All RV stores sell different types of air bags but they have one's that look just what you have,Camping world does sell & install.