You could look at the rubber pad on the pedals. Wait....that's for
Buicks.
Look, Walt....gliders are like good looking women. You walk up and if
you mumble "Damn"....you're most of the way home. If the owner will
let you touch it, your intuition will guide you the rest of the way.
No one really gives a sinking ship on the number of hours as you can't
hide wear and tear easily.
Of course, if you're talking about Tin Cans....it's 'Buyer Beware". A
detail inspection is in order.
A bigger concern over hours would be damage history not entered into
the log books. A very small concern at that though.
Or the type of flying...ridge vs. thermals. Glider home port...inland
vs. marine air. Outside vs. inside.
The reference of a seller would be most telling.
R