I’m probably repeating what others have said, bit just wanted to add my thoughts to this.
You will pay much more for a bathroom if you do a deal through a Salesman who visits from a showroom. The mark-up on the units is huge and they also make a huge profit on the fitting too (which is often sub-contracted out), so when they give their first quote, it’s way, way, WAY over the top. Unfortunately, some people fall for this first quote, sign the deal and wave the Salesman out the door as he is mentally booking his next holiday.
Often people like yourselves will challenge their price/quote and that’s when they bash away their calculators and amazingly cut the price down. If, after much number crunching, the Salesman thinks you’re on the verge of signing (but not quite there), he will do the “I’m gonna have to phone my Boss on this one. He’s not gonna like me calling him, but I need to get him to authorize any more discount. Now, you WILL sign the deal now if he agrees to something, wont you?” That’s his closing line, right there!

If you want the most cost effective way of changing the bathroom, then buy the suite yourself and get a plumber to fit it for you. Try to get at least 3 quotes on the job. Also make sure each plumber quotes for exactly the same job. That way you know exactly where you stand.
If you’re unsure of the ‘design’ then by all means get a Salesman down to measure up and give you a no-obligation quote. That way, you then have a much better idea of the ‘design’ when you get quotes from plumbers.

As you can probably tell, I could go on and on about this, but I’ll save your comments space. If you feel the need for some more advice though, feel free to contact me.

But I hear so many stories about idiotic salespeople, from those that refuse to leave to those that refuse to accept “I’ll have to discuss it with my husband/wife/partner” as a valid reason for apparent indecision. I wonder whether the world separates into ‘people I know’ who won’t get bullied and ‘other people’ who succumb. Somehow, I suspect it’s not that straightforward.

In bygone ages I have fallen for sales’ spiel, although in my defence it has either been for trivial amounts, or I have taken advantage of the ‘cooling off’ period, or it has been for an ‘approved’ charity at a time when I have felt open to persuasion. My big repeated mistake is booking holidays with insufficient thought and research (and that’s without being sold at…!)

Cheap crap companies use salesmen, polish workers and frun like hell if anything goes wrong, as your home insurance will point out when it does.

Been there..done that…