Average cost to have bunion surgery done is $5,560.00 so I would say it would cost you around $6,000.00 to have bunion surgery performed to remove the bunion depending on where you're located since the cost can vary.
There is a device that you can buy though that you put on your feet and toes and it's supposed to correct your bunions without requiring bunion surgery.
I don't know how well it works though but it's worth a try anyway.