I would say definitely at that price. I could try to explain to you how to do it, but you'd be better off googling fiberglass repairs and read the many threads out there. Just learn as much as possible before jumping headfirst. Cracks are much easier to deal with than chunks taken out of one of the front corners like I had.
If its a thin crack, I found that the 'kitty hair' or fiberglass strand to work pretty well for me. Not sure if that's the best way to go at it but it was the easiest because the hardtop has inner and outer layer with space between it for the most part so it seemed difficult to build the layers with thin pieces of mat.
PM me if you have other questions, I'll help as much as I can.
Penn State University - class of 2004