Another thing to consider is the actual amount of sketch cards that each artist did. In the past, each artist generally did the same amount of sketch cards. The big exception was that Jay Lynch only did about 50 in OLDS3 so his sketches were selling for significantly higher. The quantities of sketch cards drawn by Jay Lynch, George Wright and Brent Engstrom from OLDS4 was substantially lower. Even though there is not a lot of detail in the Engstrom sketches, they will demand a premium based on the quantities drawn. Many wacky collectors want at least one sketch per artist. In this series, these three artists did disproportionally lower quantities than the other artists. I believe that these three artists probably did between 75 to 125 sketches each.