Instruct: Classify a given review as either positive or negative.
Query: Boyds Bears Collector's Value Guide

I found this book to be very helpful when trying to establish the value of my resin bears. Even though I'm not planning on selling any of them, I'm always in the market for more and want to make sure the price is in line. I also like to see whether the value of my bears is going up or going down in today's market. I think anyone with resin bears would find this a helpful reference.