Probably in the $180 ballpark. there are some things we need to iron out before we know for sure. The big one is insulators for the LM4780 chips, which need to be isolated from the heat sink. No one seems to make a stock part for this, but we are talking to Berguist about having some made from there kapton-based Sil-Pad K10 material (.006" thick). If that turns out to be too expensive, we might just ship small pieces with a cutting guide or something. Anyway, it's that type opf detail we are trying ton finalize before we know. It will be cheaper than the equivalent TXO, however.