Here is the link to the vintage auto racing thread we have on here. It does not get much action anymore, but there is a ton of information in the thread.
http://www.net54baseball.com/showthread.php?t=220356
Beansballcardblog in that thread put together a complete set of T36s, and shared his progress in that thread.
Barney Oldfield and Louis Chevrolet are the two most expensive cards, although prices seems to be rising for the set across the board. T36s don't stay on eBay long anymore, and even common drivers have been creeping toward $100 lately. Huggins and Scott had a full set of T36s and a nearly complete set of T37s autos recently that went for around $2,000. That just seemed like crazy money to me, considering that past complete sets of T36s have usually gone in the $500-700 range.