Not a joke...
Take a look at the vehicle they use. If the license plates are missing, beware. You must establish beond doubt the manufacturing date and integrity of the battery. Something is screwy here. To purhase the batteries in Sata Fe Springs, CA then transport them to Quartzite and sell them sans the 9% county of LA sales tax is just too much to swallow. The Californis State Board of Equalization is damned strict about sales tax enforcement.
But boosting a cargo load of batteries is not unusual. Truck and all. A vendor I represented had an z F600 stake truck boosted that was loaded with GNB batteries.
IMHO Use god-given wisdom whatever couse you take