Rare three door?

[CG]

I was watching an old episode of West Coast Customs where they built three rides for veterans, this was a brain child of Ebay. One of them was a GMC Suburban. All three vehicles were purchased through Ebay.

So they build them and then surprise the recipients with the vehicles. When they deliver the suburban of course the lady from West Coast Customs touts how it is one of the very rare three door suburbans.

Now we all know that all the burbs from 67-72 were three doors. They made lots and lots of them. Its not like they weren't all over the place for many many years. So I'm wondering how the heck they ended up being tagged as the rare three door suburbans?