I have been successful on freecycle.org by asking for what I want or need versus begging the donor to select me regarding their unwanted items they just posted. Remember, you are not the only person asking for their donated goodies. For example, on the subject line (freecycle.org post rules) I would enter "WANT: WORKING DISHWASHER" then on the details I give them a brief explanation of my situation like "I don't have the cash to buy one right now and willing to pick-up at anytime. I am located at the Beach location."