How do I figure out the market value of used books?
Half of original MSRP at Amazon is a good option for books that are in good condition.  Another option would be to use eBay, specifically Half.com.
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### Instruction:
How do I figure out the market value of used books?

### Response:
Half of original MSRP at Amazon is a good option for books that are in good condition.  Another option would be to use eBay, specifically Half.com.