$0 or $<over 9000>
0$ because if you want it for portable gaming, there are a lot of console (open) that are better un every aspects (screen, cpu, gpu, QUALITY, BATERRY LIFE) like the pandora, wiz, kangoo, etc
$9001 if you can to keep it for a decade or two, then you can sell it as a colectionable (as you can see some do with their originals NESs, ataris, etc)
as for the game......i don't know...... upload it somewhere (not ilegal in my country, don't know yours) or sell it.