Yeah, that was our "good friends" at Lexus of Orlando. Ken Martin said about $80 for the belt and an hour’s labor (didn’t know they charged $100/hr labor). None of this registered true with me, so I "respectively" declined. I guess we have to pay for their new service building, free snacks and car washes.
They nailed me for about $600 for the 60k service, which consisted mostly of replacing fluids. It would have been more except I didn’t let them balance and rotate the tires. I am sure I could have had this done for a lot less somewhere else, but didn’t want just anybody messing with the transmission.
Even with this, I am not too sure how competent their techs are. I had a 94 LS400 that they said had a bad mass air flow meter which wasn’t the case (they install one and it didn’t fix it). I suspected it was an oxygen sensor, they replaced one, but the other had seized and could not be removed without R&R the exhaust manifold. I ended up buying the 98 LS400 before they fixed it.
I have a 1999 GMC Sonoma truck with 50k miles and the people at Valvoline Oil Change wanted to replace the serpentine belt on a few months ago. Today I inspected the belt and it looked fine to me. I would bet the Toyota belt on the Lexus looks just as good, but it is not as easy to check with out removing some things. I will probably replace the belt in a couple months after it cools down here in FL.