Posted By: 
cmokingBobby, I love your site, and I use it almost every day.  Congrats on your good work.
However, your perceptive powers are incredibly weak.  You mentioned you thought the cards were down 50%.  I just went over your site and picked out 20 cards at random.  I would have picked out more, but the numbers were so obviously different than 50% that I stopped bothering.
Here's what I did.  I looked mostly for PSA 5s and PSA 6s.  I clicked on 4 cards in the first 5 pages on VCP.  I only took information if the same card in the same grade had sales both after May 2007 and between January 2006 and September 2006.  In other words, I wanted to compare the market in the last three months to the market from Jan 2006 - Sep 2006, about a year's difference.  There were many cards where data did not exist for both time periods, so I moved on to another card.
Over all, I picked out 2 PSA 7s, 12 PSA 6s and 6 PSA 5s.  
The average card went down.  But only 5%, a far cry from 50%.  With a sampling size of only 20 cards, there's a fairly wide margin of error to the 5% number.  But I'd guess the margin of error is not wider than 10% points either way.  So a fairer ranger is probably to say the decline is somewhere from up 5% to down 15%.
Here are the individual cards I looked at.  I took the average of the % increase/decline (rather than compare the average in prices of cards) because I did not want the high dollar cards (like the 92 PSA 6 Gehrig) to influence the price differential much more so than a common (like the 96 PSA 5).  
I rounded decimals for individual auctions.  For multiple auctions in the same time period, I averaged them.  The first number is the card number, next is the PSA grade, next is the post-May 2007 sale, next is the Jan2006 to Sep2006 sale.
2 PSA 6 414/515
11 PSA 6 104/169
19 PSA 5 283/277
24 PSA 6 128/134
28 PSA 6 156.5/168
29 PSA 7 1108/1076
45 PSA 6 174/192
49 PSA 6 338/257
55 PSA 6 229/148
60 PSA 6 191/166
61 PSA 6 85/97
74 PSA 7 464/371
78 PSA 6 87/89
85 PSA 5 56/52
92 PSA 6 2343/2398
96 PSA 5 43/54
107 PSA 5 138/138
117 PSA 5 153/142
124 PSA 6 78/98
136 PSA 5 54/58
Conclusion: The Goudey mid-grade prices seem to be very close to what they were a year ago.  50% is not in the same universe in describing the market activity in 1933 Goudeys.  +5% to -15% is probably a good range for the set as a whole.