I am looking to sell a STR,  Are there buyers who buy a fully furnished property?

Do a long-term rental or medium-term furnished rental in a single-family home (or even condo ...

Furnished mid and short term rentals will cash flow if managed correctly and you find the right location and property size. 

. $24k cash that the buyer(s) did not have to come up with to close and could be utilized towards the upgrades, furniture and furnishings or mortgage payments until their rental gets up and running. 

I'm trying to find a property manager that handles mid-term rentals and will also need help with furnishing the properties.

Besides being a local Bismarck Realtor, my husband and I own 19 units locally including some  long term unfurnished, short term furnished, and midterm furnished.  

If you moved in yourself and used a 100% Section 179 depreciation for 5-yr property (furnishings, appliances, carpets etc) - you have to recapture depreciation now.

We put in around $15,000/$20k worth of construction & furnishings to bring it up to Airbnb standards.

For the family market, you might want to do VRBO, Booking.com and you could also look at Furnished Finder to at least learn about the mid term market. 

I used a DCSR loan and I spent around $30,000 to furnish the property & get a Airbnb ready.