While looking at older cars i can't even afford ( they're even asking 10,000 $ for a 1986 Corolla ) i was shocked to see that one of Rod Stewart's cars is here in Montréal ( or at least, said to be own by him at some point ) . Any other similar finds ?

dhill, found a little gem for you .. but they might be a little bit nuts over the price..

Sometimes I found cars who belonged to celebrities or sportsmen in classifieds too, I remember seeing ads for Renzo Arbore's former Jaguar XJ or Vincent Candela's former Mini Cooper (well, less famous worldwide than Rod Stewart but still.. ) and surely others too usually more valuable cars that belonged to world famous people end up in auctions too, like Diego Armando Maradona's Ferrari Testarossa or one of Michael Schumacher's personal cars (IIRC a Mercedes W210 AMG)

Mecum Auctions this past weekend featured a 1971 Stutz Blackhawk owned by Elvis:

https://www.mecum.com/lots/LN1122-524292/1971-stutz-blackhawk/