At 90,000 miles the following maintenance is required per the service manual: replace air cleaner element,inspect valve clearance,replace transmission fluid,replace timing belt and idler pulley(and inspect or replace water pump), replace brake fluid (and check rotors and pads) including ABS system and inspect all cooling hoses and fuel line connections. As you can see this is a major service (per the service manual) if none of this has already been done to date. As for prices.........as I'm in Canada they might not be relevant.....further I do all my own service so perhaps someone else can quote you some prices.