a legit upgrade seller please give me some advice ect

ok first of all i am looking to open up a upgrade shop in about a month latest november 14th
and my method is to go and buy
the $7.95 upgrade cards from gamestop or walmart
like 100 or more of them
what should i price them as?
and when i sell alot im looking to donate about $100-$300
please give your advice and honest opion

 

15M each, doubt anyone would go further than that.

 

ok thank you for your advice

 

anybody else got anything to give me for advice or opion?

 

tbh i think you lose money in the long run if you buy retail

 

yes this is true but it is the only way i know of
unless i charge .40/m for $8