How much the replacement of brake booster?

I have a 1997 Ford F-150 4x4 and my brake booster is leaking. I have not the time nor knowledge to do it. Could someone give me a ballpark estimate on the cost to replace it?

It will cost somewhere between $5 and $5000. If you want a BETTER estimate, then pick up a telephone and call a local repair shop that does that sort of work. Ask THEM what it would cost.

Close to 500 dollars plus or minus a hundred.