Ask the seller if he/she can bring the gun in question by an ASC gundoc in their local to do a once over and report his/her findings to you via PM.
I would also be prepared for damages by looking up spare parts and source out a local gundoc just in case. If you have any other worries, have your local gundoc do a 5 point inspection as soon as you receive the gun.
"Hey I'm the first one to say its a great country but its a straaaaange culture. This is a place where gun store owners are given a list of stolen credit cards but not a list of CRIMINALS and MANIACS. And now they're thinking of banning toy guns...AND THEY'RE GONNA KEEP THE F**KING REAL ONES!"
-George Carlin 1937 - 2008 (RIP buddy)