I'm sure they're out there, it only depends on your definition of a decent price. Great lens in it's day and even by current standards it's quite good but it's a more difficult beast to handle with slide film in that exposure is best by bracketing your shots to balance the degree of falloff against possible compensatory overexposure in the center. Corner falloff and lack of TTL metering makes it less desirable to me than say, the current ZM 21/4.5 Biogon. Although 2/3 stop slower, falloff isn't nearly as bad and it can be used with TTL bodies, even an M5.
<a href='http://www.rangefinderforum.com/photopost/showgallery.php?cat=500&ppuser=2121'>My Gallery</a>