This can happen a lot in a tight market, but it always makes me uncomfortable and many times these contracts fall through.
Denver has experienced a slight shift in the real estate market, and seeing homes linger on the market longer than past years. In the lower price points, you still could see a frenzy, as there are not many on the market.
On several occasions Buyers living here in Denver have asked if they can write an offer before they see it, and get their offer into the Seller. Over the weekend, I had a Buyer's Agent tell me her Buyers wanted to write the offer prior to seeing the home. Although each and every offer received must be presented, most listing agents will put other offers ahead of ones where Buyers have not physically been in the home. Especially relocation Buyers, as if they come out and see the neighborhood and/or the home in person, they may change their mind. Taking a home off the market for a Buyer that has not seen the home is usually not a good idea, especially if priced below $500K with so many Buyers looking right now.
It is always best for the Buyers to view the home, see the neighborhood, and the all the amenities the area has to offer before submitting an offer. In past years, we have seen a 25% fall out rate, due to Buyers making quick decisions, then having second thoughts, or writing on two homes, and having both offers accepted.