Mike Brewer would say :- cost of car ?500
cylinder head skim ?100
plus parts CHG ? 75
Timing belts + tensioner ?125
water pump ?45
new oil and filter ?45
coolant ?30
Total cost ?920
Profit ?580
Selling Price ?1500.
Low miles, fsh, new belts, new CHG.
Have no idea of actual figures, but you can put the real ones in, note, no charge for Ed Chinas time, just like TV.