I have bought two pieces of tumi on ebay and saved a bundle. I am happy with my purchases. I bought a backpack style computer bag and a 22" expandable roll a board. I paid a large sum online for the rolling bag but out of luck it was being sold local to my area so I contacted the seller (a luggage repair shop in my area) and went and inspected the item. The guy at the repair shop told me it was dropped off for a minor repair (something with the handle) and the owner never returned to pick it up. It did have the initial plate embossed and after I won the auction he replaced the initial tag for me with my own initials. I got it at about 30% of the original retail price (~$200) and it seemed very minimally used (though not brand new) condition. There were no marks on the fabric. Overall I wouldn't hesitate buying Tumi off of ebay again. I am sometimes leary of "brand new" because it sometimes raises the "fake" flag. I would rather buy a barely used piece from an individual than a new with tags piece from a dealer who may be trafficing in fake merchandise.
After receiving my Tumi backpack I proceeded to put my Briggs & Riley computer bag on ebay and the buyer seemed pleased.