They only reset if you sell the house to somebody without using "Show crates" first.
This is why I have a "face-to-face" transaction policy.
Quoted below is my "Face-to-Face Transaction Policy" from my terms and conditions
Face-to-Face Transactions
Ron’s Real Estate Company only takes part in face-to-face transactions. Why? Imagine a person who wanted to buy your property is unable to because someone else came along and purchased the property.
Once a negotiation is final, each party needs to schedule a face-to-face meeting time.
Doing so can be done through the forums (personal messages) or through steam (steam can be found on my forum post).
I will then walk you to the house, finalizing the deal, and listing it for the negotiated price.
Edited 45 minutes ago by Ron Johnson