When I walked in to Bruno痴 recently and was asking about pricing and mentioned the no tax for out of state, I had to show him my Texas license and walked him out to my truck with Texas plates. I got the feeling they don稚 like the no tax thing but have to do it to compete.
Interesting. I can understand why the dealer/salesman asked for your driver's license. He would need to confirm that you in fact live at the out-of-state address where he delivers the tractor. Otherwise, the buyer might be giving a cover address (e.g., a relative's, a buddy's or an employer's address), while actually living in Arkansas and intending to bring the tractor right back into Arkansas. But what's curious to me is why he needed to see your truck's
license plate.
Not to get too convoluted here, and I'm sure it didn't happen in your case, but I've heard of rare cases where a vendor will even allow the buyer (or the buyer's agent), to load the goods at the dealership and then "self-deliver" out-of-state without paying sales tax.

That's a huge risk for the dealer (although not the buyer). Not only is the dealer then liable for the sales tax he failed to collect, he could also lose his business license, and even face criminal charges. The "self-delivery" pretext doesn't work because even in a "point of delivery" state (e.g. Arkansas and most others), the test of "delivery" is where the buyer "takes possession" of the goods. So, if the buyer, or even the buyer's good buddy with a trailer as a favor, were to pick up the tractor at the dealership, then transport it to the buyer's home across the state line, the dealer should still be collecting state and local sales tax. That's because the buyer has effectively taken possession from the dealer there. Moreover, if the buyer's state of destination has a use tax, the buyer will be liable for use tax (absent some exemption)
as well, because no equivalent (or greater) sales tax was collected in the dealer's state!