I think you have the advice all covered.
Get it on auto trader, list as a z4 18i with mid tier options, low miles & partial BMW service history. Reverse the remap (if you can - I think superchips offer this service). Don't mention all the fluff about being the very best available / wrapped in cotton wool / owned by 3 nuns & 1 vicar stuff - buyers will not beleive it & why should they trust you?
To cap it off, all your 'extra details' only relate to the car in the last 2.5 years.... but it is 10 years old. So only slightly relevant in any case.
To the average buyer (your market), the 'best available' would have all the options (no), low milage (yes), great condition (yes), always serviced at BMW (no).
As a stock 2013 car, words as above, I reckon you would get your £12k in a few weeks. The cars with more options (spefically NAV - you might scoff, but I reckon most people look for it) will sell before yours does, unless you are cheaper.
With regard to motorway / WBAC, I would be surprised if you get a reasonable offer at all due to the remap.
I know this will sadden you, but this is truth. The only person who values your car & thinks as highly of it in it's current state is you - or maybe a close friend / family member.
Applied to us all unfortunately - I hate it selling a car I have put a lot of effort into.
Get it on auto trader, list as a z4 18i with mid tier options, low miles & partial BMW service history. Reverse the remap (if you can - I think superchips offer this service). Don't mention all the fluff about being the very best available / wrapped in cotton wool / owned by 3 nuns & 1 vicar stuff - buyers will not beleive it & why should they trust you?
To cap it off, all your 'extra details' only relate to the car in the last 2.5 years.... but it is 10 years old. So only slightly relevant in any case.
To the average buyer (your market), the 'best available' would have all the options (no), low milage (yes), great condition (yes), always serviced at BMW (no).
As a stock 2013 car, words as above, I reckon you would get your £12k in a few weeks. The cars with more options (spefically NAV - you might scoff, but I reckon most people look for it) will sell before yours does, unless you are cheaper.
With regard to motorway / WBAC, I would be surprised if you get a reasonable offer at all due to the remap.
I know this will sadden you, but this is truth. The only person who values your car & thinks as highly of it in it's current state is you - or maybe a close friend / family member.
Applied to us all unfortunately - I hate it selling a car I have put a lot of effort into.