you may want to be careful. some come with male pins instead of female headers, also be careful not to get repaired boards, a common failure is bad serial communications, power regulation, and also make sure that they include proper chipset. if in doubt it is better to ask vender questions.
You might want to take a look at [www.panucatt.com] . We have had good luck with it. It seems to 'play' much nicer with a lot of different computer configurations that we tested it on vs a RAMPS setup.
