Always a type collector at heart, there are some that we rarely see for sale such as D303 (both varieties), D382 and some others. And then there are some that when we see them we either get them or might not have another chance at all. And then too there could be a big find of any of the super rare ones, at any time. Both of these boomeranged
. One that used to not be so hot were the T215 Red Crosses. It seems they went from a few hundred dollars to $1k+ overnight, and have been there for several years.
