Updated. Normally $200, Amazon has QuickBooks Pro 2010 for PC on sale for only $129.99 $127, the lowest online. This software tracks all of your business's financial information: sales, expenses, and business loans. It creates invoices and reports and allows you to view customer, vendor, employee, and payroll information. Plus, shipping is free and there is no sales tax (except KS, KY, ND, NY, WA). Compare this price to $200 at Staples.