After several weeks it still smelled so bad my wife made me crawl up in the attic just to make sure they didn't have grandma stuffed up there too.  

Go to an REIA meeting locally, and tell everybody that you will do anything it takes to LEARN REAL ESTATE INVESTING, such as any job they don't want to do; for instance doorknocking, stuffing envelopes, putting up flyers, data entry, anything

Sell it and get something else that brings money in so you can grow.If you are in a stable job that you love and you are looking more towards retirement and you believe there is still plenty of "up" left in your market, then maybe stuffing $700/month into the property as an investment makes sense.I personally do not think it is a good idea to speculate on appreciation, but it can be very lucrative.

Good stuf @Linda Weygant.

There are a couple of old couches in the yard, a window a/c unit in the front of the house and a towel stuffed in beside the ac unit to close the gap.Crime searches in the neighborhood don't turn up anything terrible though so I don't think it qualifies as a war zone.This was sold as an occupied REO which means I haven't seen the inside of the house yet and I don't know anything about the tenant history. 

I remember she and I sitting around the dining room table at my parent's house, where I was living without electricity because they couldn't pay the bill, stuffing envelopes by candlelight so I could get rich quick.

No one knows what will cause it, but as Kathy Fettke (if you don't know who she is go and start listening to her podcast and look up her website STUFFED with brilliant people https://www.realwealthnetwork.com/learn/real-wealt...has said, "Bubbles don't slowly leak...they burst." 

I think a suitable analogy is electric cars, its the difference between ford coming out with an electric car that is basically a ford festiva with  bunch of batteries stuffed in the front seats and the gas fill spout converted for a 110v socket compared to a tesla which was designed from the ground up to function as a sleek electric vehicle that is sexy and beats all records.

should I invest In a direct mail campaign with yellowletterscomplete.com Or do it my self and spend hours stuffing letters by hand?

If its within the past 6 months then he is probably stuffing the property to make the numbers look good.