If you want to be cheap, of course, it is a publishing house or a publishing house. The problem is that if you don't have this quantity, you are not qualified. Generally, you can only buy from the local second-hand book market, but you can't enter the second-hand book company.

Real cheapness is the core.

However, there is good news. Several publishing houses have joined forces to authorize Enron Bookstore to open its dealer qualification for free, give you an air store, and edit and upload books at a 20% discount. Someone buys an automatic order, the publishing house delivers it, and your share is automatically settled. So there is no need to hoard funds.