They have the freedom of choice of who to sell their property to and on what terms are acceptable to them.

My biz partners and I found a house on the MLS and used an agent to make a cash offer, which was accepted and we paid 3% commission.  

I was about to email back offering another 10K when an email came through that the sellers accepted.

Can I have it towed or do I need some sort of lease addendum specifying this is not acceptable?

Here is (was) the deal:I found the worst house in the best neighborhood....3 bd/ 2 full bath/2 car Gar/ Finished basement (which needs to be refinished) We have an accepted bid for 95k, the appraisal came in at 102k and in "Fair Shape".

It's coming out of the front of the HVAC at about eye level, goes straight for about two feet, does a 90 degree turn (all still at eye level), goes another two feet, does another 90 degree turn and then sort of gradually works its way across the next four feet until it disappears up where the ceiling meets the far wall.  

I don't understand why they wouldn't accept money from me. 

Set the tank temperature to 140 degrees and then set the mixing valve to send 115-120 degree water to the fixtures. 2.

I have not accepted any offer and will likely counter. 

I just got a seller to accept an owner's finance offer.