ZR Replacement: Is €440 a Fair Price?

Hi, I just wanted to know if this is okay, because the price seems a bit high to me.

ZR Installation/Disassembly 143€
Timing belt tensioner, installation/removal: 6.50€

Reference number: 51€
Turning/rolling (4): €62, €29, €58, €29.

'Fairy tale tax' amounts to €440.

no water protection.

Seat Ibiza SDI model, year 2001.
already at 60,000 km.

Why are there 4 redirecting rollers?

That's the AKU (we were looking for the MKB before, remember...).

Where are all the roles supposed to be?

m;

Hmm, those parts are always quite expensive anyway.

A friend of mine received offers from both ATU and Seat for approximately €300 each, including warranty and maintenance. (for a Seat Arosa SDI).

I think the price is okay.
The labor time charged for a TDI Audi A3 is 3.5 hours.
So, the working time has already exceeded 300 euros.
However, you really do need 3.5 hours for that!

ps. The water pump should generally be replaced! This is only applicable if it is driven by the timing belt.

SDI engine with 68 horsepower.
I have no idea what those roles are. I own a Corsa myself, and it only has the water pump and a tensioner pulley on the timing belt.