Selling books online can be very profitable. When individual sales are quickly glanced at the potential for profits can seem great.  I have bought many books for $1 and sold it for $30 or more many times – very fat profit margins.  The thing of it is that becasue I do everything online I can lose track of my margins.  Managing your bookselling venture like a small business is important. 

I sell my books online and do almost all of the back office business online.  This creates a very simple business to run but because so much of the processes are done online.  My books and envelopes are the only real things I store.  I manage my overall business on a cash basis but keeping track of the details is important.  Here are things that are easy to lose track of in terms of really figuring out what your margins are:

• Marketplace monthly fees – Amazon is straightforward but eBay is variable
• Commissions taken per book by the marketplaces
• Postage – Amazon takes another chunk here
• Cost per envelope
• Monthly fees of Endicia
• Monthly fees of Inventory Management System – in my case The Art of Books
• Cost of books

The list can go on and it becomes depressing how much others make when I sell one book – everyone gets their cut.  So when I sell a book for $10 that I bought for $1 I am not making $9 (or even $8).  This is one reason it is some important to figure out your margins as you can figure out what books are not worth selling.

Keep track of everything, work the numbers and focus on the bottom line and you should see your profits increase.  Regulary shop around for new vendors.  Is your inventory management provider the best for the money.  How about your envelope provider? Ink toner?  All of these eat into profits.  Spend time shopping and save.

Many online booksellers wonder about the mysteries of the Amazon Sales Rank.  These booksellers ponder the deep philosophical questions of what is the Amazon sales rank – how is it calculated, when is it calculated and what does it all mean and when will my book sell.

The bottom line on the Amazon Sales Rank is this – the lower the number the faster the book should sell.  What this means that if you have a book with a 40,000 sales rank and another with a 600,000 sales rank the one with a 40,000 rank is in higher demand.  Does this mean the lower rank will sell first? Not neccesarily – you need to factor in supply, your price point  and the books condition.  The lower ranked book likely has many more of them for sale on the Amazon marketplace so your copy needs to be priced to move as other copies are going to be listed after yours  and they will likely beat your price. 

 I recently got a copy of Tom Dorsey’s book Nuclear Jellyfish (I still have it unfortunately).  I listed it on Amazon to match lowest price for its condition and expected it to sell in a day or two given that the book had just been released.  Weeks have gone by and the book is still on my shelf because the price dropped on it almost immediately and I am terrible at repricing my books with any regularity.  There are, of course, dozens of copies of the book for sale and it is likely heading to penny seller territory soon enough.  Its sales rank at the time I listed it was below 10,000.  Usually the book sells quickly but sales rank alone is not a guarantee.

I have had books with high sales ranks (in the millions) go immediately.  This is often books that are out of print and there are no other copies for sale or the copies that are listed are prohibitively expensive.

Amazon Sales Rank is predominately a buying tool for me.  Sales Rank and price are the two main factors in considering what books I buy.  If it has a high resale value I will generally buy a book regardless of sales rank.  The lower the resale price the lower the sales rank needs to be.  Generally any book that sells for less then $5 I will not bother with regardless of rank.  Between $5 and $10 the sales rank needs to be very low and above $10 I am willing to have books be between 400k and 800k in rank.  Above that the book needs to be at least $12.  All of this is fluid and depends on how much inventory I have and how sales are.

So does it matter how Amazon calculates sales ranks? No.