I do this all the time. I spent a summer working in NYC and used to visit Strand Books pretty frequently (at least once a week). Stand has an interesting model

I do this all the time. I spent a summer working in NYC and used to visit Strand Books pretty frequently (at least once a week). Stand has an interesting model because the downstairs is filled with used books. I'd regularly do a price comparison check on the used titles versus their Amazon counterparts. What I found is that sometimes the brick and mortar bookstore actually had the price advantage with these used books. When you factor in the minimum $3.99 shipping cost on a lot of used Amazon non-prime titles, they came out to being slightly more expensive than the used books I looked at in the store. This wasn't always the case, but it happened at least 30-40% of the time.