Insider sales on property

[Lane Smith]

I check my local real estate listings multiple times per day. A few mornings back a duplex popped up for a rediculously low price (100k for 3/1,3/1).

I called the realtor at 0900 and after leaving several messages with no reply I spoke with a secretary that afternoon and she stated the property went under written contract as soon as it was listed.

I would have offered a substantial amount over list price for this property as comparable units are selling for 50k more but am unsure of how to get past these immediate contracts.

Do I write the seller to let them know they have another buyer? I want to avoid this happening again.

Looking for advice

Thanks