It’s easy to keep the selling price the same….
They will just keep throwing in incentives.

Buying down rates, get a 30 YR fixed at 4.5%
Upgrades.
Pay HOA’s for 5 years
Pay property taxes for a year or 2 or 3.

Sounds like potential lawsuits when the properties don’t appraise for the inflated price and the builders have to lower the prices to meet an excessive appraisal.