Maybe they should advertise more, my 19's came with 2 pairs of their inserts and I sold one of them to a foreign buyer for much more than their price, I felt bad, I didnt think they would sell for more than 20$. The buyer was very pleased, but for a specialty product like they produce they could easily get 150.00 a pair if quality control is kept in check. Good luck to the Darst's very cool that someone started a cottage industry around a 30 plus year old speaker.