Hi Matt,
As a seller of a CSL, I guess you do have a fairly straight choice, between Millennium and Munich. Both are quite a different proposition in my opinion; Millennium have a good online presence with their various operating brands, whilst Munich are by far the enthusiasts 'go-to-place' for all things M-power.
Munich have clearly carved out a niche in being specialists in BMW and M-cars ONLY- with an extremely deep bench of knowledge in the workshop, bodyshop as well as on the sales floor. As a seller you may not care too much about that, but for someone in the market to BUY a low mile, high value CSL you might wish to consider your potential buyer base and what reassurance comes in knowing that experienced M-technicians have been over the car with a toothcomb.
I purchased a CSL from Munich Legends within the past year, and was impressed and reassured with the level of detail they went to in dealing with all my queries. Stewart who heads up the workshop, was v transparent, talking me through every nook and cranny of the car. I even took her back recently for a weeping front shock that was on back-order from Germany, and whilst they had her in, gave her a full detail for me, and sorted a couple of other snags with no issues whatsoever.
I have not dealt with Millennium, but would say that as a buyer, I was willing to pay-up for buying through Munich, given the reputation they've built as M-car specialists. I like that they will continue to service her for me going forward and are well respected as specialist M-car service centre and aside from that, they're an enthusiastic and passionate bunch, whether your buying or selling !
Anyway - Best of luck with your sale
