There are several alternative Faikin sellers, good luck to them. A few have ordered boards that don't work, no clue why. I mean I use the same files to order, but oh dear, how sad, never mind. It is all open source, and I try to help where I can.
My guess is roughly $30 for board, $30 more for SCD41, and $30 more for LCD.
But depends, and this may be $25 each not $30. I have to factor VAT for people in UK. which sort of makes the difference there.