It would be rude not to.
Bike needs a full sort out to make sure it is safe. My relief at releasing the seat pin and removing it to find a well greased tube clean as a whistle inside - well, you had to be there...
Cranks were removed for transport, so the cotter pins have had it. I just tapped them back in, pumped the tyres up and went up the road. Brakes do work - sort of. It also changes gear. No front mech but a double chain ring with very close ratios.