However, damages, fees, or costs are not recoverable under this section against a retailer who has, in good faith, engaged in the dissemination of claims of a manufacturer or wholesaler without actual knowledge that it violated this part.(3) In any action brought under this section, upon motion of the party against whom such action is filed alleging that the action is frivolous, without legal or factual merit, or brought for the purpose of harassment, the court may, after hearing evidence as to the necessity therefor, require the party instituting the action to post a bond in the amount which the court finds reasonable to indemnify the defendant for any damages incurred, including reasonable attorney’s fees.

If the allegation that there are no comps is true, go get a commercial loan.

If this is as serious as they allege, they need to GO, move, give them their deposit upon moving. 

What’s their alleged justification for fighting this fact?

This:"BUYER UNDERSTANDS AND ACKNOWLEDGES THAT THE PROPERTY MAY BE ENCUMBERED BY MECHANIC’S OR MATERIALMEN’S LIENS OR OTHER LIENS, JUDGMENTS OR ORDERS RESULTING FROM ALLEGED VIOLATIONS OF LOCAL ORDINANCES AND BUYER IS TAKING SUCH PROPERTY SUBJECT TO THOSE LIENS, WHICH MAY OR MAY NOT IMPACT BUYER’S ABILITY TO OCCUPY OR TRANSFER THE PROPERTY IN THE FUTURE."

But this property was going to take more work now, and absolutely more work in the future, than I am willing to put into it. 2 units vacant for over a year (out of state owner, hasn't tried renting them out, allegedly). 1 unit in the middle of an eviction. 2 units filled on MTM leases.

When you don't pay them rent it can be physically dangerous (allegedly).

How do you quiet title against a co-owner, what do you allege as to why you have better title to 100% of the property than the other guy? 

I can be blatant about describing this because I've never been a builder's in-house pocket lender, so no one can point at a past transaction of mine and allege funny business.

Allegedly they saw violence next door and also had a gun pointed at them.