Not wanting to fall out with you mate or cast aspersions but just wanted to say I think its a little bit naughty advertising it as -
'Rebuilt Supercharger - Ported to stage 4, fitted with new oil seals, bearings and kluber grease, apex seals were not replaced as were within the limits, rebuild done a few months ago, unused since - £350'
When it has had only the centre scroll bearing replaced (the other 4 were untouched and condition unknown) and 5 oil seals. We put some cheaper nitrile seals in that i've never used as you agreed to test them to see if they were up to the job or would sh1t themselves as soon as used.
In addition it also had some damage to the outer side charger casing.
The world of G40s is very small and the same amount people buy / sell to each other - so in order to avoid any future problems please could everyone be as accurate as possible in describing their goods otherwise it can lead to problems with us admins sorting out disputes!