I've always loved 2nd hand bookstores. Where else can you hunt through the shelves and find that book you've been seeking in an almost new condition for half the price?
It's cramped, you can't always find the latest, but hey... it *is* a used (mostly) book store! They also have gently used CDs, DVDs and oh-mi-gosh-n-golly... LPs! I've found many a treasure in a closeout for 50cents each.
Shop often as their stock moves in and out very quickly, especially for gift books. Also check the bargain racks. You never know when a book you've got in hand just happens to also be on the bargain rack. A little more dog-eared perhaps, but still readable!
In December, if you spend $30, you'll also get a calendar for the next year with discount coupons in it. Altogether... a great place to spend a rainy afternoon and come home with more books than you originally planned to get.