On/for which the guide price?

My ear prefers "for."

I wouldn't consider "on" incorrect.

Can you explain what "the guide price is fix" means?

To add to GG's question, I think the last word should be 'fixed'.

My first instinct was that it should be fixed, but I still don't know what it means: "on/for which the guide price is fixed."

That's the way I took it. (I didn't even notice the error.)

I don't really understand it either (not with fix or with fixed).

Possibly the intended meaning is that the selling price for the house is non-negotiable. If that is the case, then I would say there are a number of ways to express that idea. However, the original wording would not be one of those ways.

Hi Yankee,

How would you express this idea?

Palinkasocsi

The selling price on my house is non-negotiable.

According to Google, "guide price" is quiet common in the UK, for houses, cars, auctions, etc.