At 15k at the least the rear tire would have been changed ask him when they were done as well as fluids. Might want to pull the covers off the master cylinders and see if there's any gunk in there. Fluids are all due (easy enough to diy). Ask about fuel stabalizer if none the gage is over 2 bars of fuel and it starts right up I wouldn't worry about it. Dump some techron seafoam etc in top it off with fresh fuel. Check the windshield and headlight adjust with the engine off for signs of mech binding or the head light hunting for position. Does it start right up without a clock or odo reset if it does a new battery is in your near future. 6500 seems a little high. Let it warm up to 3 bars and wait to make sure the fans cycle. ABS if it's a must have means walk. Adding it isn't $ reasonable. 1.5k a year sounds fairly typical for a fair weather rider garage kept queen that needs to be broken it.