Hi guys.  I just started collecting T206 cards a couple of weeks ago.  I figured I'd start the set by building a St. Louis Cardinals team set in VG to VG-Ex (and a reprint of the O'Hara until the check for my Nigerian lottery winnings come in 

).  I would like to get a nice representation of the different back brands available and here is where my question comes into play.  Can I get an estimate of what some of the less common back types will run in the VG grade?  I don't really care about varieties within the different brands just an example or two of each.  I hope this makes sense.  
I'm sorry if this is an annoying question to the T206 experts of the forum but any help is appreciated.  Thanks!
Chris