So bit of an update:
Fixing the turbo waste gate actually costs more than buying two brand new turbos. Tunetech refuse to fix the bush if you give them just the turbos, They want the whole car so they can charge you through the roof. 16k before they even get started lol
My mechanic sent my turbos off to get the wastegate fixed and found that the center cores were worn, So replacing the center cores as well as fixing the wastegate rattle costs more than buying two brand new turbos if your trading your old ones in. I am not sure if I got taken for a ride or not here as I am not a turbo engineer but the one turbo did have a bit of play on it however they were not smoking. They were however very loud on spool up and spool down and I remember my 330d was sounding like that just before the turbo exploded into 4 pieces so I am not sure. The seller did say that the turbos were always loud with him too, I remember him mentioning in a old post that the turbos made a whining sound. We will see how the new ones sound to see if its because of the downpipes that they are so loud.
At the end of the day the car will have 2 brand new turbos from BMW which gives me piece of mind...I guess.
So I sent my old turbos in to BMW and ordered two new turbos which I will get on Monday morning.
Turns out if you give them your old turbos you get a massive discount. Apparently the wastegate rattle problem has been fixed in the later revisions of these turbos.
What my old turbos were reduced to.
Things that are getting done as per quote:
Engine Flush
Fuel Line Cleaner
Engine Wash - Full
Degreaser
6.5 Synthetic Engine Oil
Sump Plug Sealing Washer
Sundries
Oil Filter
Cabin Filter
Tappet Cover Gasket
Turbo Charger Cylinder 1 - 3 Supplied
Turbo Charger Cylinder 4 - 6 Supplied
Wheel Alignment
Engine Sump Gasket
Turbo Oil Drain Pipe Gaskets
Turbo Oil Drain Pipe Seals
Carry Out Oil Service
Remove & Refit Cabin Filter
Remove & Refit Tappet Cover
Remove & Refit Turbo Chargers
Remove And Refit Engine Sump
He is also fitting the new O2 sensor that I got with the car.
Should get the car early next week hopefully.