I've been keeping a spreadsheet to compare prices per unit volume of ferro rod. Just for kicks, I put the NanoSTRIKER in there.

Firesteel.com Armeggedon w/ handle & scraper = $36.18 per cu. in. of ferro rod (2.5" x 0.375", $9.99 for all parts).

LMF Swedish Firesteel Army w/ scraper = $68.17 per cu. in. of ferro rod (2.125" x 0.375", $16 for all parts).

Exotac NanoSTRIKER = $434.42 per cu. in. of ferro rod (2" x 0.1875", $23.99 for all parts).