ktmsooner

I was checking today on some new front brakes for my 04 ls 430. I found the pads at the Lexus dealer for 85.00. The kicker is I was told that I needed to replace the bolts that hold the brake calipers on too. These bolts are 8.50 each. I have replaced many front brakes on cars and have never heard that you should replace these bolts. There are 4 of these bolts total, not that much, but is it necessary? Thanks for any input