Several people may" bid "on a property at the same time this is perfectly legal. The best example to this is an auction. A competition between buyers who outbid each other to win the rights to the property.
In this process the seller has the right to refuse bids until the one meets his criteria. Selling by auction has become very popular in recent years . I provides the seller with the opportunity to promote the sale of his property within a reasonably short time and receive at times a higher and better price than on a conventional market place. I will be glad to provide your more information if you contact me directly. As an auctioneer I will be glad to show you how multiple offers or bids work in practice . Auction is not for everyone. As in all sales the buyer must be motivated and be realistic. Buyers that participate are well informed of market value and they come qualified. Most auctions the buyer pays cash and buys the property as is.
In the end, it is always one party that buys. That buyer should always be the strongest offer. Simultaneous offers being accepted together is not only unethical and in many cases illegal it is not really in your best interest as it can expose your transaction to legal issues if the party that does not get the property feels they were in some way slighted or handled unethically.
Shoot straight and choose what is strongest.
I am in agent in the Port Richey, Florida area, the anwer is No a seller can only accept one signed offer on his or her propery, it can be put on the property active with contract and back ups requested if the seller feels its not a strong offer and there are chances that it could not make it to closing.
Two "Primary" offers would be illegal. Question: Can you sell your car to two different Buyers? You get the point.