I have the full solutions manual in PDF format of a popular differential equations textbook:
Boyce, William & DiPrima, Richard. Elementary Differential Equations and Boundary Value Problems. 8th Ed. 2004.
It is currently being sold on Ebay and half.com for about $6.00. Since I already have it, I would llike to share so as to not rip off my friends and help as many as I can. If you would like a copy of it for free, simply e-mail me at the address noted in my user info. I would be more than happy to help you.
-A fellow engineering student