i recently won one on ebay, the same part number as listed on this site, so hopefully will fit a graflock back. what should i look for when i recieve the holder, to judge the condition? the photos look like there are no bent septums. hopefully it will work for some time, without jamming, taking the pressure off carrying film holders.

Watch out for light leaks, wiremarks and dust shedding - the seals are usually worn and often dirty. Most other problems are obvious by looks or operation - but these will only show up on film!