Normal front brake pad is about $35, rear about $25. High performance ceramic pad will be 4x the price. So change all 4 should be $60, or $240 for high performance brake pads. Gary Automotive normally quote $60 each which is $240 for all. Please their labor charge of maybe $120/hr * 2 hr and $100 - $200 for other charges like inspection * 4 wheels + tire check * 4 + brake cleaner * 4 + waste disposal * 4 + caliper check * 4 + brake hose check * 4. That adds up to $650+. Their price is about the same as dealer price.
Never go to them for this simple job