I am not familiar with that type but have seen English nodules and American flint and Cherts advertised for 2-3 bucks a lb. plus shipping, I would want to know how well the blue stuff sparked before I paid that much for it, sometimes the shape of the piece you start with limits the usefullness/number of flints or spauls you can get out of it, depending on what method of making flints you are going to use. I got a 5 lb. nodule of English a couple of years ago that was basicly worthless as it was so knobby that I got very few flints out of it, I could only strike a few spauls and not any long flakes that could be broken into "English" type flints.