Going to be the best part of £300 for a 'new' oem maf.
Don't you think a wrong turbo unmapped and a decat unmapped would be more of a concern?

Yes I do but going of he's symptons if the car was fine and only started doing it sound like a maf sensor to me , but I could be wrong I'm no expert

I don't think he said the car was ever fine? I took it as it's been like this since he owned it?
As you will probably know throwing new parts on doesn't always cure the problem and isn't cheap.
I understand it can be frustrating but with the ops car it has wrong stuff on there.

When you have a car that has had wrong parts unmapped thrown on it has been proven to cause problems.

Didn't use the car till today and it's drives even worse OMG stutter judder stutter undrivable pops bangs smell of fuel is horrid. No codes on the ecu cleared by leaving the negative off 30 mins defo a huge problem...