Thanks everyone!
@petespockets yeah, it's really weird. I have found six 2000 WAMs, one 1998 (this one), and one 1988 reverse of 89 (also a RDV-006 variety). Of those 8 RDV-006 varieties, 7 came in batches with multiple, and only one was the only one in its batch (found two 2000 WAMs in a box the first time, found two 2000 WAMs and the 88 reverse of 89 in a friend's change jar, and then found these two in a batch together today. Only one 2000
WAM was found without another RDV-006 in its batch).