To me, the price varies considerably depending on a number of basic factors:
-Is it scored neatly, and is the scoring system used easy to follow? Is the handwriting neat and clear?
-Is it scored accurately? ie: does the scoring match what actually happened?
-What happened in that game?
-Are there any additional inscriptions that are interesting?
-How much do you value a Babe Ruth home run game, or a Ty Cobb hit game? They both did these things quite a bit
-Is the program itself generic, or is it stadium or date specific?
-Is there anything about the programs that make them particularly attractive, or particularly ugly?
-Then the actual condition--everything intact, nothing loose (or almost loose), clean pages (no stains/residue, etc), and so on..
Since valuation is ultimately so subjective, I can't give you any specific amount. For example, in my personal valuations, if a program is sloppily scored, scored inaccurately, or looks like it is not period scoring, the value would take a major hit. And this is even before other condition issues might be factored in.
Hope this helps a bit!
Charles