The Gladiator was sold as both a rear wheel drive and four wheel drive truck. The solid front axle came standard, but intependent front suspension was an option.
This truck was very configurable. It came as a cab and chassis, stake bed, wrecker, and chassis mounted camper style. The bed also came in Thriftside, Townside, and Stakebed configurations.
There were military versions of this vehicle named the M-715 and M-725. Even these can be found out there on the collectors market.
The Gladiator is considered collectible by the right collector, but only if it's in the right condition. You can find them listed in your local classifieds. There are also some listings on eBay if you look at the right time.