I just got my first Fiberglass Fett helmet. With Resin pieces. Cost me about $200 on ebay. I've been fiberglassing like crazy for the last week. I cut out the WARPED cast (vinyl original- probably a 96 or...GASP.. 97) cheeks and made new flat ones on a foil-covered cookie sheet, moved the back detail out 1/4", cut out the visor, and added about 3/4" to the entire bottom length. It's much better now.
The flare is pretty good- almost up to deluxe dimensions now.
I'm going to send it off to be painted, about $150. So that puts the grand total at $350+. Not bad.
I bought a VINYL one last year, for $75 on ebay. I think. It was from HK, so the shipping hiked it up, too. But I sold it. I think it was a 96.