There are many second hand book stall in our area ,they sale second hand with some new. In first hand book stall there is no concession but in second hand stall 15 to 20 % concession is available.I purchase many books there.
One thing I notice is that in many second hand book stalls , the popular ones , the bestsellers are priced quite high and some relatively unknown but more weighty books are sold for a very low price since there are not many buyers for that kind of books..
That's true. Once I came across a novel by Agatha Christie in one of the second hand book stall at Delhi. The shopkeeper refused to sell it for less than Rs 200. while the less popular ones were being sold for just Rs 20. So, I purchased a brand new Agatha Christie novel from the normal book store with additional amount.
Sometimes purchasing a second hand book can be risky if we buy it in haste- some pages might be missing or torn. So, normally I take my time while buying the second hand books to add to my home library.