The seller is a little confused. That IS a Jeepster Commando but it IS NOT a CJ-6. They are quite different vehicles. And the engine is 225 cubic inches not 221 as stated.
It's also interesting that he doesn't give the year, but it's 1971 or older, Kaiser era. The 1972 and newer AMC era trucks had a boxy front clip and the Jeep inline 6.