Beginner questions about buying a sailplane...

No, I am not planning to buy anything for at least a year ... but I
have often wondered what other "hidden" expenses or obstacles there
are associated with buying a used glider.

I regularly see older planes in the $10K USD range (which is well
within my price range). BUT, for future reference, what inspections
are required for the glider to be considered air worthy, and what else
should I know before considering such a purchase aside from obvious
structural damage or electrical problems? How much damage should I
consider "normal wear and tear" such as delaminating wing tips, bent
rudder, etc which is a relatively easy repair versus something which
is major (wing struts, etc)?

Also, is there any specific paperwork (flight hours, maintenance
records, etc) I should insist on seeing, etc. Is it common to pay
someone else to inspect the aircraft prior to purchase?

Lastly, are there any specific gliders one should avoid as a first
used glider? (such as homebuilt kit planes, etc)?

Thanks
-tom