Selling spreadsheets helps you to build a catalog of spreadsheets that you can take with you and use in various areas of your life. Spreadsheets built for sale are usually built for flexibility and would be customizable to your life, or job, or new life, or new job.
Serving for a multitude of purposes and being renowned for their efficiency and reliability, spreadsheet solutions have a major contribution to business management and development. Existing spreadsheet solutions are no longer limited to accountancy processes (monitoring financial data, managing budgets and facilitating a series of data manipulation processes); they can also be successfully used as means of business analysis, organization, as well as forecasting, allowing companies to gradually expand, achieve better exposure and neutralize the competition.
When VisiCalc hit the scene back in the eighties (in the last century), the relatively small group of Apple II users went crazy. It was like manna from heaven for the poor accountants, scientists and engineers who were used to filling in enormous analysis sheets with a pencil. Now, they could use VisiCalc to do the same task, AND calculate the result automatically.
You can build a reputation as an expert spreadsheet developer. This certainly doesn't hurt the resume. Using Excelville.com to sell spreadsheets allows you to set up a profile with your work, biography, and other info that certainly makes for good conversation material during interviews.
examples of spreadsheet packages
spreadsheet templates for small business