It should look like this
It is designed to carry tools which are heavy. The frame is based on the M101 chassis and its 'C' channel 2x3. Its leafs are soft but with multiple leafs, provides a good ride with little weight on them. Axle will have the drums on it for the parking purposes. Some even come with the tongue surge hydraulic brake. The tires should be 9.00-16s and about 36" tall. The sheetmetal portion would be cool with dual opening sides and a rear access door, but could be heavy due to the configuration and floor support. The fenders are 1/4 plate steel and very heavy. The tongue frame is triangular, bolts to the front leaf mount, and the front frame crossmember has bolts which can be pulled to make a dump trailer. The lunette tongue is heavy and due to the design, it will be noisy in any pintle mount. The lights should be black-out design and have multiple bulbs, but they will be 24v bulbs which are not compatible with your Jeeps 12v, nor is the connecter. The carrying capacity is truely too high for your Jeep and camping gear. M101s are designed to carry upwards of 4000#s offroad safely, 5000#s on road.
I've got a M101 chassis which I got rid of the heavy axle and tires for a Dexter 3500# with parking brake and electric brakes and 14" tires. I also got rid of the triangular tongue for something much lighter. The lunette is good for all purpose offroad, but not really necessary for your use. You can sell the lunette and stand for practically what you will be paying for the trailer itself. If you want to pull the trailer offroad, I would look for
multi-axis coupler to use. Though a 2" ball with the trailer tongue level should be more than enough for back roads.
I started off with
Added Dexter axle with stock suspension
Added boat trailer frame for a tongue
Put a camper slide in box on
And I weighed it the other day after hitting Moab for a week, it weighs ~1300#s with a 160# tongue weight and that is without the firewood I had lugged out there. Camper is 450#s, I only had spare front axles for my TJ in the front black box, so this should give you an idea on the weight of the frame, axle, and tires.
If anything, bid what you would like (my frame was $90), but if you win, MTL you'll have to fill out a EUC certificate (End-Use-Certificate). This type of item auctioned off by mil surplus has this requirement. Sometimes it can be a PITA to fill the EUC out correctly. It should take about 2 months or less to be able to pickup the trailer after the EUC process. If you do buy it, I would suggest you lower it by swapping out axle/tires, replace the tongue and lights for something more compatible, and look into using the sheetmetal as a sleep quarters. Good luck.