AS others have mentioned, it may not be too difficult to replace seals. However, I agree that you should take it to your LBS... when replacing seals, that isn't the only thing to look for... scarring on the stanchions(legs) etc.. if things like that aren't checked it could cost you more money in the long run. Your LBS will also know what type of seals to use, AND ones that may be having issues. Some forks also recommend that you have an installation tool to replace the seals. And if you are using it in the winter, perhaps you'll want a lighter weight oil as well. Hopefully it is as simple as replacing seals.