I spoke with BretG the other day and he is on the mend and about to get back to his work bench. Any questions about costs of getting the work done ought to be addressed to Bret himself via email at firstname.lastname@example.org
As for the market rate for a completed KL, they are like CD said. I have seen them sell/trade for $800 - $1100+, depending on features and demand.
PPS performance tune is just over $100 for a K-series (check their site or call them (916) 923-9676 for actual prices) and nickeling is not that pricey either.
I love my KL.