Are these three Ebay auctions offering the same HP97? All three are from the same seller and have this statement or similar: "There are some markings with pen near the print head and on the back of the case."
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1363967055 sold July 8.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1365757810 sold July 16.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=1368583509 ends July 29.
The second and third have identical looking photos and the third might be a re-list, maybe the second buyer decided not to.