From my first hand experience:I bought 1999 Fazer last November. 16k miles on the clock and great condition, no dents or scratches anywhere. According to MOT history it's done 2k miles in last 4 years.I knew right away I'll have to replace downpipes by next MOT (leaking exhaust advisory), 160-180 quid if you can do it yourself.
Suspected I'll need new tyres, turned out correct - 180 for a pair of Michelin Pilot Power CT 2 (Roads were too expensive
).
Chain looks OK but lost fair bit of O-rings - replacement is around 100 quid if doing yourself.Brake lines have no bulges or leaks but I want to replace them anyway - another 100 for set if doing yourself.
I accepted that when buying 20 years old bike that hasn't done many miles in last few years I will have to spend at least 500 quid for consumables. But I intend to keep it for a few years and I'm using it daily for commute, so I'm willing to do it all.
My take on it is: Buy cheap and spend extra doing stuff yourself or pay more hoping it's been done already - works out the same in price so I'll do it myself and spread the cost over few months as well.
Heated grips - I've spent 3 hours on mine because I got distracted with fitting USB charger, checking air filter, checking oil, coolant and generally rummaging around under the tank (it was off for wiring grips so why not
. Doing just grips would be under 1 hour I think.