How much?

Are you asking because you are looking at one to buy, or because you have one you are looking to sell?

Either way, not enough info to lay a number on it.

 

Look in the Truck Paper, be careful many have been abused.

 

Be sure to look at the under side of the trailer. They do take lots of abuse.

 

When the trailer is setting on the ground, look at the neck. The neck should sit level (the left side and right sides of the trailer should be even when facing it).
The underside cross members can be broken or rusted through. If there's damage, you CAN see it.
Check the wheels and wheel hubs for leaks, bends and damage. Rgns are extremely difficult to maneuver, and so they do get curbed quite a bit.

Because the trailer is so low, if you dont have a way to lift the trailer, take it to an oil change area with a pit. if you really want a good look.

 

Being an extendable, open it up & make sure the rollers have been greased on a regular basis & still function as they should. Also check the integrity of the tray/trough that runs down the middle for the air & electrical lines to lay in. Seen a bunch of XLs have rusted out ones, they can & will bind, preventing closing it back up.

 

If its a typical XL that has the wood covered rear deck then look at the rear transition where the deck connects to the wheel area. Check the outside section for cracks and of course underneath for cracks also. With the deck closed and it connected to a truck check to see of the rear deck slopes down to the rear or if it is level. If its level and/or you find cracks in the transition then it needs to be re-pitched and reinforced. I see it all of the time in XL, Trail King, Talbert, and Fontaine at the truck stops that are double drop stretches and even ones that are not stretches. It can be fixed, but then you have down time. Going down the road at times you will come across a loaded trailer and see the wheel area angling up at the rear which tells you its been over-stressed on some point in its life