QUESTION: I've been selling used books on Amazon Marketplace for a few months and would like to expand to other sites. What is the best software program that would enable me to list my books on more bookselling Web sites? I'd like to be able to track all my transactions and sales tax.

ANSWER: Back when I started five years ago, the Seller Engine software (www.sellerengine.com) was available for a one-time fee of $150. Now it's much more expensive, available only as a subscription service, about $40 a month. And it sounds as if you need more capability as far as bookkeeping, etc., which is not handled by Seller Engine.

Personally, the only software I've used for handling my Amazon business is Seller Engine and Intuit's Quicken personal-finance software. I have a business checking account where I can download all my transactions from my bank, and assign them to categories such as books, postage, mailing supplies, etc. This has worked fine for me, but it only allows me to view my total sales.

To figure my sales tax obligation, I use a Microsoft Excel worksheet containing my individual Amazon Payments transactions. I sort the transactions by state in my worksheet, then get a total.

It sounds like you may need more capability. If you need to track sales tax and the amount of each transaction, you may need to integrate Intuit's Quickbooks small-business accounting software with one of the Amazon inventory-management programs.

Every few weeks it seems another software startup is launching a new service for selling on Amazon Marketplace and the competing bookselling sites. There's a wide range of capabilities and fees for these products, so you may want to consider what sort of price range is acceptable.

I know some of the Amazon seller software products will let you export all your transaction data, which could then be imported into Quicken/Quickbooks. And many of the newer programs will allow you to list the same inventory on multiple Web sites.

Here are a few of the most popular vendors, try plugging these product names into Google: Bookrouter, Aman for Marketplace Sellers, BookHound, FillZ, Art of Books, Prager Software, Readerware, SellerMagic, BookSku, and MonSoon.

See a real-time list of the most highly sought after used and collectible books.

Read more free articles on selling used books profitably online: http://www.weberbooks.com/selling/selling.htm

Steve Weber is author of "The Home-Based Bookstore: Start Your Own Business Selling Used Books on Amazon, eBay or Your Own Web Site" (ISBN 0977240606). Got a question for Steve? Send to: steve_weber@yahoo.com