DO NOT SELL YOUR BOOKS HERE.The Strand has a new policy on buying books. Once you walked through their door they own your books and pay you whatever they wish after their 'appraisal' Nasty.
The tables in the aisle are often packed high with new books at slightly cheaper prices. Look down, if the table has a bottom area, for used versions for way cheaper.
After careful analysis, I realized that I typically spend an average of $1 for every minute spent in this intellectual candy store. Of course this means I can't linger for more than an hour or so...