What should i check on used cars/trains

[playmofire]

Here are the items I bought from UK DS in September 2010.  I'll look for the invoice and update this with the prices, if I still have it. 

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+45+2850 - flatbed truck end

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+62+9542 - flatbed truck side

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+25+7850 - flatbed truck base

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+25+7830 - railway waggon chassis

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+20+9140 - buffer

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+03+7250 - end platform

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+25+7840 - holder for weight

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+05+1180 - holder for weight

http://playmodb.org/cgi-bin/showpart.pl?partnum=30+81+2580 - weight

http://playmodb.org/cgi-bin/showpart.pl?partnum=30-26-1590 - this piece will replace the handle at the ends of the coaches and waggons.