Advice needed on Selling Phone numbers

Hello friends

I recently got some access to get Indian sim cards with life time validity they can be used for PVA purpose like for gmail, youtube and facebook i dont know what would be the best price to sell them for

please advice the price i can sell them for so that i can start a thread at buysell thread

Also is there a way to make money from numbers other then selling for pva purpose

Note: each number will have some indian rupees in it i can send premium sms but can i make lots of money from it at-least half of what i spend from the money on the phone