No scanners?

After this year's Unionville High School used-book sale I wrote about the problem of the for-profit book resellers who clog up the aisles with their wheeled carts and assistants and generally aren't very considerate of other customers (obviously, not all of them fall into this category). I saw an ad for the Quarryville Library's annual book sale (Oct. 23 through 26) and it looks like they've had a similar problem. Their solution: they don't permit scanners at the preview sale on Oct. 23 or until noon on Oct. 24. Interesting idea.