I actually just watched a You Tube video with Jay Leno and Donald Osborne on this subject . Both VERY knowledgable men!
Donald has access to ACD's and Auburns, big dollar cars. He said he actually prefers driving a 1930 Ford Model A Standard Roadster the collection has! Loves the car. He further stated that certain models of Model A Fords, the more desirable and collectable like the '30 Roadster, have appreciated about 35% in value in the last five years!
Mr. Osborne and Mr. Leno are a LOT smarter about antique and collectible cars than I, I'll let that rest with those two guys!