I wasn't overly impressed with them, came across as a fairly average clunker. But every London courier was either on the 550 or 750 (750 had a shaft drive so less service) so should be plenty around.
Mine got squashed by a Ford Escort - which was a little annoying as I was riding it at the time. I replaced it with a CBR600F1 (87 version - not worth much now by all accounts), and that got squashed by an Isuzu Trooper. I stopped commuting to London on a bike after that!!!
There is much better units around than what i could sell ya Gos.Or would want to either.
One is a rider,the others are spares,nothing even looks 'good'.