Can i activate a sprint iphone 4s with virgin mobile?

Everybody is getting an ipone 5 now.somebody i know said they would give me there iphone 4s once they got the 5. The 4s on vm is really expenisve. 600 dollars. Do you think i could get the same plan with a used/another company iphone (btw i think sprint bought vm) or are there extra charges

This will not work the model numbers for the phone will not active under a vm phone plan if it is a sprint phone. It is true that vm does have the same coverage as sprint.