Each one opens the real software with the work already done — comparable sales scored, condition read, seller placed. Nothing here is a mock-up. Move any slider and it re-prices, because it is the same arithmetic a paying customer runs. The only fiction is the property.
Because the whole argument of this product is in the difference between them. The same house is worth a different maximum under every exit, and the gap between the best exit and the obvious one is usually the entire margin. A calculator that answers one of these questions will confidently give you the wrong number on four of these five houses — not because its arithmetic is wrong, but because it was answering a question you had not established was the right one.
The sixth is not a house. The desk prices seven exits on a building and refuses the eighth — the land play — because it needs dirt and a building is not dirt. That refusal used to be the end of the sentence. It now opens a room: the Land Desk, where what a parcel is worth is what the finished lot sells for, minus what it costs to get there, with an unconfirmed septic named on the line it is hiding inside.