e97e341c_ting_business___Small_Business__Advantages
[0] Book debts [Disadvantages] The seller’s debtor book may be full of debts that are old or otherwise difficult to collect, and therefore could end up yielding little cash. [Advantages] 
Sometimes as the purchaser of an ongoing business, you will get the benefit of uncollected book debts – generally the terms on which you do so are negotiated as part of the transaction. The ability to collect some of the existing book debts for your own account might help you generate cash shortly after you buy the business – rather than having to wait until you generate your own invoices and collect them.
Advantages and disadvantages of buying an existing business - Small Business
Advantages