As both a long-time seller and buyer, I share the general trend of sentiments and comments above. Going one step further, I tend towards standardization in definitions so I use bicyclebluebook.com's definitions of a bike's condition and corresponding value estimate. They only use the following categories: Excellent, very good, good and fair, each with the following definitions. These are not to be overstated in my opinion. "EXCELLENT: The bicycle looks new and is in like-new mechanical condition. The frame & fork have no visible or detectable blemishes or damage. All components, parts, and accessories are clean and free of any visible & detectable blemishes or damage. No service is required on any component, part, or accessory. Tires and grips/handlebar tape are original spec and in pristine condition. VERY GOOD:The bicycle looks good, may have minimal cosmetic (only) blemishes on the frame, fork, components, parts and/or accessories. The bicycle may require minimal service adjustments without the need of replacing any parts. The suspension (if applicable) and braking surfaces are clean with some signs of usage yet free from grooves & pitting. The tires, grips/handlebar tape, and brake pads may show signs of usage yet have a majority of their life remaining. GOOD:The frame or fork or components or accessories have cosmetic blemishes. The frame (if metal) may have minor, aesthetic dings. Paint is faded slightly and/or slightly discolored and scratched. Bicycle is free of major mechanical issues but may require some service, a tune up is recommended. Some parts may require replacing, not to include front or rear shocks, wheels, shifters, front or rear derailleurs, braking systems, crank set or chainrings. Items that may need to be replaced include: tires, tubes, grips/handlebar tape, brake pads, brake hoods, chain & cassette, brake cables, gear cables, any/all housing, brake fluid and shock oil. Braking surfaces may have minor grooves or discoloration. Suspension and brakes may need to be serviced. FAIR:The frame or fork or components or accessories have cosmetic blemishes. The frame (if metal) has minor, aesthetic dings. Paint is faded slightly and/or slightly discolored and scratched. The bicycle has some mechanical issues and a tune up is necessary. An overhaul is recommended. Multiple parts need to be replaced. Suspension and brakes need to be serviced." Some terms I have come across in my time and their definitions below: "Basically new" = Almost new, but not new."Hardly used" = Used sparingly over a period of time. Also, not new. But probably in good condition."100%" = It functions 100% but is not 100% of it's value. It isn't an antique either. Apologies for the lengthy comment, although, I am a firm believer in the "free market" and willing buyer willing seller phenomenon, I do think it is time we start being open and transparent with one another.