Here's the link to Recreatives Industries MAX ATV website:
Amphibious Six-Wheel Drive All-Terrain Vehicles: MaxATVs - Call 1-800-255-2511
Look around and it should give you all the info and stats you'll need. Generally speaking, you can pick up a used Max for less than a comparable Argo. Depends on where you live, though. Midwest & east coast will likely have more for sale. If you can work on a lawn mower engine and do the most elementary of maintenence (lube & adjust chains, grease zerk fittings, etc.) and keep the machine CLEAN then you'll love 'em. Obviously a cleaner rig will last longer and be more trouble-free than one that's dirty and left to rust out.