I know it say no second hand friend of a friend stuff but I service my buddy's G36KV and play with it quite a bit so I know his gun better than he does.
1) Make and Model
-- SRC G36KV Gen 3
2) Date Purchased
-- January 2011
3) Cost
-- 400$ plus S&H
4) New/Used?
-- New
5) Mechanical Problems
-- It has a folding stock that holds the battery and the wiring was a bit short at the bend point so it tore off the tamyia connector there the first time it was folded
6) Esthetic Problems
-- N/A
7) Rounds Fired Between Failures
-- like 20. coulda went on forever if the stock wasnt folded
8) Changes to Internals
-- N/A
9) Resale Date and Value
-- never probably and if he ever did it would be many many many years from now and probably to me
so idk 200$ maybe