The $4500 seems kinda high. We bought a 1999 Coleman Santa Fe in 2000 for $4500, it was in very good condition. The only thing it needed besides a bucket of water was a tent bow.
The equalizer will depend on the camper and tow vehicle.
For anyone to answer, we should know the camper model and the tow vehicle.
I'm the lucky one, my wife married an idiot.