This is my last ebay research, but it's 1 hour old and i've seen more trades have been done in this time.
SOLD:
$1 = 42
$1 Bk = 3
$2.50 = 91
$2.50 Bk = 10
$5 = 132
$5 Bk = 21
$25 = 101
$25 Bk = 165
$100 = 156
$100 Bk = 97
$500 Bk = 26

ON AUCTIONS
$1 = 19
$1 Bk = 0
$2.50 = 568
$2.50 Bk = 16
$5 = 584
$5 Bk = 132
$25 = 27
$25 Bk = 703
$100 = 60
$100 Bk = 528
$500 Bk = 42

Numbers are not accurate as many auctions are not.