My information is 2 years old but here is the e-mail address I contacted,
spyda@spydacreations.com, and the information I was given:
Neal Adams Commission Prices
8.5"x 11
Bust (head and Shoulders) - $500
1/2 Figure -$700
Full Figure - $1000
2 character Bust (head and Shoulders) - $900
1/2 Figure -$1200
Full Figure - (Neal can't do 2 figures on one page this size. It's just to small of a space)
11"x14" (These are only pre order. Neal does not bring 11"x14" paper to the shows)
Bust (head and Shoulders) - $700
1/2 Figure -$900
Full Figure - $1200
2 character Bust (head and Shoulders) - $1200
1/2 Figure -$2000
Full Figure - $2400
As a special for shows, Neal does a profile on his convention sketch paper for $200. it's size is the same as those blank comic covers.
These can be pre-ordered too
I have talked to Mr. Adams a couple of times at shows and have found it to be an enjoyable experience both times.
Here is the commission I received.