I have a set of 160/120 Michelins from my RS250. Used them for three laps in the rain 2 years ago and they sat on my wall ever since. If you know Aprilia 250s, they are VERY easy on tires (always got a whole season from one set).
I wasn't going to sell them cause they'll fit on my motard, but to be honest, the street tires I use are absolutely fine in the rain.
I believe they were $375/set. Make me an offer if you're interested.