Simply put, you will not get a "great" folding knife in this price range.

If you want an adequate knife, the Leatherman c33x which with careful shopping, be purchased right at the $15.00 upper limit.

Change your price range from $15.00 - $25.00 then there are some good (but not great) knives to be had...

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Earth and sky, woods and fields, lakes and rivers, the mountain and the sea, are excellent schoolmasters, and teach some of us more than we can ever learn from books.

John Lubbock