Depends on the game.
$5 for NES tennis? no thanks.
$5 for the Legend of Zelda or Super Mario Bros. that's a steal!
It costs $14 on amazon for a used copy of the original NES version of Zelda.
Super Mario Bros is $800 new or $2 for a piece of crap game only that barely works.
Ocarina of time is $150
Super Mario 64 is $110.
Even the used games are more expensive than VC prices.