If I wanted the house I'd say, "No, we have an agreement and I mean to hold you to it."

I had something similar happen when I was buying a lot to build a spec home on. The seller is a large volumn realtor who did not want to make any waves. The neighbor did not like what I was planning to build next to him and filed a lawsuit to block my plans. The realtor selling the lot asked me to let her out of the deal and I said no dice. we have a deal and I expect you to deliver it to me.

She hung in there and I eventually bought the lot, settled with the neighbor and built a very nice house there. The neighbor ended up paying all my legal fees and extra interest and I agreed to move the house on the lot, which by that time I had decided to do anyhow.

If you want the house tell them you intend to hold them to the agreement.

I'd look extra hard at it though in the inspection, because it looks as if they are trying to keep you from discovering something negative.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.