Are these vultures, or is this a deal?

[Jason Mizell]

2 months ago I purchased a 2br/1ba house for 38k that is in good shape and the best house on the block.  No tenant yet for whatever reason, but I received a letter yesterday from a company saying "I was browing through a property management website and ran across your unoccupied property....would you be open to one of the following options?

1. all cash purchase of $42,411 and they pay closing

2. purchase price of $51,499, they pay closing, $3600 cash to me at closing, and I finance to the buyer at 9% over 10 years

3. purchase price of $60,588, they pay closing, $3000 cash to me at closing, and balance to be paid in 150 equal monthly payments.

Is this a common occurrence to get letters like these?  I'm relatively new to real estate and haven't come across this yet as my other properties had a tenant upon purchase.  Would appreciate insight from the community.  Thanks!