The low cost, "Green" alternative to going out and buying a brand new Dell is buying recycled or refurbished computers at a much lower price. There are many nonprofits that donate computers or sell them at a reduced cost to individuals and families in need. "Need" is defined and determined differently by every organization, so you'll have to follow the guidelines and instructions listed.
At www.techsoup.org/mar you can search by zip code for organizations in your area that provide free or low-cost computers. In the navigation bar, use the Directory link 'Refurbisher List by Community MAR Location.
You can also go to www.google.com and type in “computer recycling and reuse” to search for other resources. Be sure to include your state in the search box, so you're steered toward appropriate groups in your area.