Got the T-Shirt
A decent low milage 6 speed will cost you up to 3K. I paid 2.5K for a UK 6 speed with 15,000 miles on it.
In addition will be the labour.
I must admit I never liked it at first. I found the gears to close together and normal driving in traffic will result in many more gear changes that a 5 speed due to ratios.
However, I have now got used to it and its nice for the street.
On track its VERY easy to select the wrong gear when down shifting. !!!!!