i've been calling around to local mechanics, there are about 4 in my area that specialize in lexus and toyota, the first couple i called were around 700 and the last one i called was on recommendation of someone i work with, she said she has been taking her cars to him for years, he quoted me $368 to replace both sensors and the wire, thats tax, parts and labor out the door, i'm thinking he might has mis quoted me but i'll be doing the happy dance if thats really what he is going to charge me, i guess we'll find out on friday.
The MAF sensor can be replaced in 15 minutes. On the RX300, it