PlayChoice 10 games are worth a lot in themselves. I bought a working Dual Monitor PlayChoice 10 with 10 games in it for $400 a few months ago.
The games in the machine I purchased were:
Mario Bros
Mario Bros 3
Castlevania
Double Dribble
Excitebike
MT Punch Out
Tennis
Track & Field
Rad Racer
Contra
As far as your games, I've listed my best guess at pricing:
PC 10 Motherboard - $50
Hogans Alley - $40
Excitebike - $35
Mike Tyson Punch Out - $35
Baseball - $35
Duck Hunt - $30
Super Mario - $30
Double Dragon - $40
Golf - $30
1942 - $40
Contra - $35
In short, if it's just a PC10 motherboard and 10 games that you have for sale (and not an entire cabinet)...I'd sell them all separately; as you'll make around $400 or more. Finally, the prices I listed above do not include shipping costs, and assume all items are tested and working.
If you do sell them all separately, I'd be interested in Hogan's Alley.
I hope this helps!
-Rafi