Fair to change ad from sale to auction?


I am asking for input to know whether an ad placed in the for sale section at a too low offering price, which gets a dozen rapid offers to buy, could be changed to an auction, to best allow the interested parties to resolve the issue of whom to let have it?
Why is the first responder the one you HAVE to sell something to?
And if indeed you get a large number of offers to buy, why not make it an auction?
I know the 'standard' here IS to have to sell to the first request to buy that fulfills the sellers conditions, but why? If I LIKE someone elses offer, and their style, why am I 'supposed' to sell it to someone I get the impression of as a jerk?
Not trying to stir up trouble, just wondering...
elizabeth
So for everyone that is offended by someone switching an ad to an auction, how do you feel about someone ending an auction early to sell to something that is willing to pay reserve? It's the same thing. I say do what you can to get the price you want.
This is just me, but I feel the opposite approach is better.

When I was selling a component which I knew would draw a lot of interest, I first listed it on auction here on Audiogon with a reserve equal to what my asking price in a classified would be. That way, if there was to be bidding, there would be bidding. It did not meet my reserve.

Once that happened, I listed it in a classified for what my reserve was.

It sold in about a half a day, and everyone was happy all around.

And, as many have said here, treat people as you would wish to be. Listing a classified, having a big response, then wanting more money is a VERY ugly thing to do. Imagine you were on the receiving end - who wouldn't feel as if they were being treated poorly?

My advice? Be happy you met your asking price, take the money, give and take positive feedback, and add it to the experience of life. Everyone wins that way.
Everybody is a lawyer these days. As a lawyer with long years in practice I find more and more that "anything I can get away with" is the current mentality. A lot of business people I deal with are the worst offenders at not humouring their obligations. OBO means, and as always meant, that the vendor was willing to accept less to sell the item within a narrow time frame. The people here have this quaint notion that it actually means some sort of "auction" procedure whereby the vendor would keep all offers to purchase open to accept what he considers the best (and to add to that the personality of the purchaser as a consideration!) is beyond the pale. I don't know about other jurisdictions, and discussions about whether an ad is simply an invitation to negotiate or an offer to sell in any given instance can go on and on, but where I live, if you have all the essential ingredients of a contract of sale in your ad and someone says that he accepts these terms, you have a valid sale. Paperwork, payment of the price and delivery of the goods are all concerns that enter the picture further down the line. Like I said, if you are going to play the game, learn the rules and live by them. In a way I am not surprised by anything on this site just thinking about folks who actually believe in hearing inter molecular activity through their speakers. I must be an alien just landed, I still am shocked by what I read here. Ma, is it OK if I poke Tommy in the eye, no one will know his parents are out and he still will have one left?
Thanks for the responses.
I am not looking to do this, just thinking about some folks who seem to not know they have a 'hot' seller, and wind up selling it in the first 3 minutes, when for $50/$100 more, it would have taken a few days... but they would be $50/$100 richer.
My own ads I list the highest price I think an interested buyer might go for. If it doesn't sell, I don't care... sortof...
do whatever you want, up to the point where you accept an offer and take someone's money. An ad's price is a guideline, and you can ask for more or less than it. Take homes in southern california, for example. List one at $550k, and you'll get 4-6 offers between $540k-$560k. Just because the a person gets the first offer in, doesn't guarantee anything. There's alot to consider in an offer.

However, its dishonorable to "fabricate" another offer for so-and-so price and request a higher price.