It was stunning in the '90s and it's stunning now. Only difference is that Rayman is nowadays a huge international franchise, whereas 20 years ago it was originally envisaged as an Atari Jaguar exclusive. Still, if you do own Atari's final console, you do owe it a copy of Rayman; it was after all the system's finest platformer and its cartoony 2D were truly beautiful. Also, it's pretty rare too.
Anyway. Here's a Rayman (Atari Jaguar) auction. The game comes complete in its box with manual and lovely cartridge and the seller ships worldwide.