When a good cause becomes a burden (long)

Couple weeks ago when the first heat wave hits MA, I decided to replace my old a/c with a new one.  My apt faces west and feels like a steamer.  Old a/c not strong enough.  Since it's still working, I decided to give it out for free, and posted it on the Craigslist.  Several people inquired about it, and some cannot use it coz it's an in-wall unit.  Many people want a window unit.  

1st inquiry:  he actually got my number and said he would come pick it up "right after work".  I live in Town A and work in Town B, 25 miles apart.  The guy said he'd be coming from Town N (5 miles from A) and hope that I'd be home by 5pm so that he can beat the traffic.  I actually took work early and rushed back home to meet him.  No show.  No phone call.  No email. 

2nd and 3rd inquiries: asked for availability via email.  Since first guy disappeared, I told them that it's still available and asked them when would be a good time to pick up.  Whoever is the first to set up a pick up time will get it.  Never replied.  Lost contact to both. 

At this point, I re-posted the ad on Craigslist.  Got a total of 7 inquiries, including the first guy. I did a "mass email" to all of them at the same time (put addresses on the "bcc" field), and re-stated that whoever is the first to set the pickup time will get it.  People started sending me emails, hoping to be the first to reply, telling me stories about landlord refusing to fix broken a/c, loss job and cannot afford a new one, heat wave killing her kids, desperately needing one etc etc etc. 

4th inquiry:  "I am not familiar with Town A.  If you happen to come by town M tonight, I can meet you there to get the a/c."  (note:  town M is right next to town A).  I was like, you are getting and a/c for free and you expect delivery??

5th: emailed me Saturday morning, saying she would come "this afternoon" for the pick up.  I waited the whole afternoon and got her email close to the evening saying she could not come. 

6th:  emailed me close to mid-night (I read it Sunday morning) saying if it's ok, he would come Sunday morning to pick up, but had to go somewhere later so cannot do afternoon.  

7th:  Got her email yesterday, sort of blaming me for sending out the "mass email" too late on Friday that she had already left work and did not received the "first come first serve" mass email.  Asked if a/c still here by any chance. 

In the mean time, 3rd, 5th and 6th inquiries asked if they can come to pick it up tonight.  Frustrated, I sent out my 2nd "mass email" to the same people this morning, saying I'll put it on the sidewalk this evening for anyone to pick up (in fact, it's not legal.  In town A, we have to call and pay $15 to have the town office to get rid of appliances).  Shortly after, I got a reply from the 4th person, saying that I was the one to blame for my own frustration, coz I "didn't send out emails in a timely fashion", and "keep sending mass emails saying first come first serve" with no pick up address, and she wasn't going to "drive all the way to Town A" to have the a/c already gone due to the "first come first serve" policy.

Questions:  Am I wrong here to insist people to set up a definite pick up time before telling them my address?  I live by myself.  I don't want to give out my address to everyone.  Am I wrong NOT to deliver it?