Paiste stopped producing the Sound Creation line some time in the late '80s. Paiste produced the original Sound Creation line, and later, the Sound Creation New Dimensions line. The original Sound Creation line are the most popular among the "Cymbalholic" crowd. Some of the cymbals in the line are sought after, specifically the 22" Dark Ride, the 20" Mellow Ride, and the 14" Dark Hi-Hats. The Dark Sound Edge hats are also popular, but perhaps to a lesser extent than the regular Dark hats. The 22" Dark China is also a collectible cymbal. To put the collectibility in perspective, a 22" Sound Creation Dark Ride typically sells in the $600 - $800 range. The others I mentioned are mostly less expensive, and the New Dimensions models are the least expensive of the bunch.
I had one of the 22" Dark rides but sold it to a friend. I currently own the hats in the picture and a 20" New Dimensions Medium Dark ride.