I paid $1264 last year for the same job. That included exterior belts too plus anti-freeze. The mechanic bought all the parts, with a nice mark up of course. Mines a 2006 Sienna xle with 233,000 miles and never had any belt replacement. I bought it and right away had the timing belt kit put in it. Sure the belt looked worn and may have given out soon. I have put 10,000 miles on it now and its going strong still. Haven't done that much to it. Engine light has been on for like 8 months now. It goes off when i add additives for the front catalytic converter fix. It still runs ok. I just do the right thing and ignore it-lol. It doesn't have any rear brakes, maybe 10% but it stops good enough. Everything else works though. For a $2600 vehicle its a good one. Scotty Kilmer persuaded me to buy a Toyota ,so i did. He was right about them. I hope to get to the 300,000 mile mark with this one.You might pay as little as $600 or as much as $1600 depending on your particular area and the specific mechanic. I think I recall the flat rate estimate is 6 hours and some mechanics in my area (i.e. the Toyota dealer) are approaching a $200/hr. labor rate plus the cost of parts.