I opened up the system just to blow out the dust and wiped down a bit of it with isopropyl alcohol but did not mess with the pins.  The system does work, but just like any old school NES there is sometimes some fenagling that needs to be done to get them to work properly.  There is some yellowing to the console, but no chips.

Comes with 5 games Super Mario/Duck Hunt, Commando, Bugs Birthday Blowout, Bart Simpson, John Elways Quarterback, and Lunar Pool.

Also comes with 2 controllers, the RF cable, AV cable, and Original Nintendo Power cord.

Please let me know if you have any questions.