Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

How do I figure out the market value of used books?
Text Book values drop rather rapidly and fluctuate quite a bit based on when you are selling (January and August-September when semesters generally start) them. I generally sell my old text books on Amazon for 10-15% less than the peak price over the last 6 months or a year if that much data is available (I use camelcamelcamel.com to get historical data). They generally sell pretty quick so I would say it is a fair price.