Looking for a legal advice

[Yuriy Grytsulyak]

Back in early August I put a cash offer on a REO property with prof of funds and desired closing of September 30th(I also told my realtor that the date can be adjusted to whatever the seller wants). My offer was 52k on a house that was listed for 45k. The listing agent said they had a higher offer and accepted it, after reviewing my offer. I kept my eye on the property and it just closed on 10/6 for 50k. Is there anything I can do legally as I feel the deal was not a fair? Or is this a common practice in REI?