Marco, I have a BMW Motorrad ProRain 3 rain suit in Size M that I'd like to see go to a happy home. It is about 4 years old and worn only once - the first day of an Edelweiss Ultimate Alps tour. It was effective at keeping me dry and, as a bonus, it kept me much warmer than just my riding suit. I quit wearing it because it is a bit of a pain to put on after boots are on. And organized rides seem not to stop for such matters when the rain starts. I now wear riding suits with rain protection in the outer layer - and sweat a bit in the summer.
The seem currently to be advertised new for about $150. If you are interested, make a reasonable offer.