The average cost for plastic surgery is fairly expensive. The factors that are going to determine how much your surgery is going to cost is the location, your surgery, and what you intend on getting done.
Usually prices will very from individuals but you can get a general idea on how much most areas are going to cost you.
The face and the abdomen are probably the most expensive areas to get done. These prices tend to range from $5000-$8000 in price.
Arms and legs are usually a bit less and can be done for $2000-$4000. These prices are just general and like I said, everyone is going to get different quotes.
For a more detailed explanation on what determines the average plastic surgery costs, check out this page. It will give you a bit more information about this subject.
Plastic surgery is a serious thing and you should put a lot of thinking and consideration into it.