Another scam via Craigslist: offering more than asking price

I posted an advertisement for a car for sale on Craigslist and this person named Yvette Miller sent an email to suggest her interest in buying my car without seeing it in person. The email she sent is as follows and in her own words:

Hi, I really appreciate your response to my email.I want you to considerit sold, pls do withdraw the advert from Web to avoid disturbance.I want you to know that I will be paying via bank certified check .Ireally wish to be there to check it out but I Don't have chance causeam very busy woman (Nurse). Concerning the pick up, you will not beresponsible for shipping. I have made an arrangement for the personthat will come for the pick as soon as the payment clears. I will likeyou to provide me with the following details to make the payment out:Full name with Full Physical address to post the check, Home & CellPhone.I will be looking forward to read from you soonest. Yvette

The only contact with this person has solely been through email because, despite asking for a telephone number, she refuses. In one day alone she sent 4 emails. My family & friends have warned me against her refusal of giving me a phone number. The fact that she was nice to me in one email only to cuss me out in another email (written on the same day) gave me reason to believe I was dealing with a scammer.

I just wanted to make note of what happened to let others know to be aware. Should you receive anything from ymiller001@yahoo.com please be careful.

I posted a bunch of things a few weeks ago... I got two different Emails over the past week. One from michsong1982@gmail.com and another from lauriehenkelp@yahoo.com.

Michsong was too busy to come see the furniture and was going to have someone else pick it up and in the mean time send me a certified check with and additional $50. Laurie started off somewhat normal except that I was sort of hesitant when she told me she lived in Ohio. From there it just got worse...her secretary sent me out too much money... money never arrived...then she is now in the UK as of today with a sick son and wants me to Western Union her the overage of money... Yeah NOT HAPPENING!!! Sad though that people who are desperate for money won't think twice before sending these people money. I just hate that my name and address now are with these people. I am seriously considering involving police?? Anyone else have gone to the police upon receipt of these payments?

Thank you!

Heather

wow!!! i just had this guy e mail me from the same compeny... i was ABOUT to go ahead with it until i decided to do some research online to make sure it was legit....

Thanks for the info guys!!

So this is what I got of arnolddavies006@gmail.com. I know this is a scam and replied he could send the payment by PayPal, offered a extra $30 because he was on 'vacation. His 'assistant' would send me a money order or 430 and then his 'movers' would pick it up:

Hi,
Ok,I'm presently on vacation but I will instruct my assistant to prepare and mail a Money Order which you will receive in the next 3 - 5 business days. I'll add $30 extra for the delay.If this is acceptable by you, Send your info i.e your full Name to cash,mailing Address and also your phone Number so payment can be mail out immediately.I will make arrangement for pick-up after you must have received and cashed the Money Order.
Awaiting your info
Thanks.

Ok, I'm sure it is a scam, but let me get this straight...
They send a money order for more than your asking price, you go to the bank, they determine that the money order is no good, and you don't go any further. Other than the inconvenience of pulling the ad (if you did), what is the actual scam? There must be something missing or else why would they bother? You still have your item and you haven't lost any money. Am I missing something? Do they do something else like use your e-mail address or information?