This breaking news comes courtesy of The Drizz, who runs the outstanding Totally Cecil blog, but tends to post about other things on the Motown Sports Message Boards.
So, what's with the red?
These cards are Numbered to 299 and found--5 cards at a time--inside of Factory Sets. I'm guessing inside regular factory sets and not those of the team-flavored variety. This makes them a disturbingly tough pull. As Drizz reports, single Tigers are running from $2-15, with Austin Jackson the most expensive, unsurprisingly.
In a follow-up, Drizz notes that these appear to be a one-off, and will not exist in Topps Update form:
topps informed me via twitter that the series 3 cards will not be red paralleled, so i don't think i'll be persuing them. nice to have a couple, though.
Which is serious disincentive to try to go after these from a team-collector standpoint, not to mention that it would be damn near impossible to do.
Still, for the Supercollectors of the world, have fun chasing these suckers down. For what it's worth, I think that they're pretty nice looking and I would be chasing Granderson till the end of days if I were still in the market. Given how long it and hard it is to put together a Gold team set, of which there are nearly 7x as many of each card, I'll have to give these a pass too.