Some prices according to the 4th Ed Chip Guide :

Denom/Rarity/AVG/SU/NEW

$1/R-1/3/4/6
$5/R-2/6/9/12
$25/R-2/8/12/16
$100/R-4/15/25/30
$500/R-6/75/125/150

The 25, 100, and 500 alternate molds arent listed in there.

However, the 11th Ed Chip rack shows the following info :

$25 Die-Cards *G* $25-$29 in AVG
$25 Die-Suits *D* $10-$14 in NEW

$100 Die-Cards *I* $40-$49 in AVG
$100 Die-Suits *G* $25-29 in NEW

$500 Die-Cards *M* $100-$124 in AVG
$500 Die-Suits *I* $40-$49 in NEW

Hope that helps !!