I just checked out 1dollarscan. Interesting. For 1 Dollar (plus tax, shipping/handling) you get your book destroyed - they throw it away - and they give you a PDF.
As some of you already know - PDF's are a major nightmare to convert to ePub. They are mostly non-reflowable... good luck trying to read that on a 4" screen!
So, you spent $1 for a nightmare to convert to a readable state, and lost your $9.99 paperback.... According to Kali Yuga you would break even with your own scanner after only 40 books!!