I have Firebird data too. And I guestimated to compensate for that. But I *am* using data to support what I'm saying.
OK, I'll ask - so how many L6 Firebird convertibles have you seen? How many 350 Firebird convertibles? And 400 Firebird convertibles?
My data shows the L6's being pretty uncommon - well under 10%. Problem is the 400's show up on ebay more since they are more desirable. Which skews perception and data.