I (scare-)quoted the price in the title now, to indicate that it's not very certain. The FPGA in question seems to cost less than $2 here in Sweden in unit qua

I (scare-)quoted the price in the title now, to indicate that it's not very certain. The FPGA in question seems to cost less than $2 here in Sweden in unit quantities (from Digi-Key: http://www.digikey.se/product-detail/en/ICE40UL1K-SWG16ITR50/220-1960-1-ND/5129490 http://www.digikey.se/product-detail/en/ICE40UL1K-SWG16ITR50...), so at least that component by itself doesn't have to blow up the parts cost.