For adult, show quality birds, $180 for a trio isnt a bad price at all. Adult LF birds will go from $50 to $150 each. You cant expect someone's years of hard work to be sold for pocket change.
Yes, you CAN show them. Since there is no APA standard written for them, the judge will probably place them according to condition and general defects and/or disqualifications. They wont go on past best of breed, though.