LLC fees are likely to be yearly in addition to the one-time fees, as states tend to follow the "leaders" on LLC's, Nevada and Delaware.
The annual fee for a Delaware Corporation is $60.00 or $200.00 for an LLC, and a Nevada Annual Corporation or LLC fee is $85.00 for either. While these are not standard (Obviously), you'll need to look into the other costs that go into an LLC other than the one time fees or legal expenses you incur.
As noted above in Nevada, the simplicity of an LLC is balanced against its heftier tax/fee schedule. As another example, North Carolina is $200/year for an LLC ("Annual Report Fee"), but only $15 for C-Corps.
-Allan :gl: