The marketplace is currently mainly being used by the Berlin community. This local community is part of a Circles laboratory, including a subsidy program. In the subsidy program, businesses can receive a EUR exchange for the items they offer in CRC, currently at a rate of 10 CRC : 1 EUR. While this impacts the pricing of some products and services in Berlin, it does not necessarily reflect the various ways CRC can be used and valued for offers outside the subsidy program and in general across the globe.
That being said, you are pretty much free to set prices according to your own will. Just remember: If prices are too high, nobody will buy your item and if they are too small you won’t be able to sustain your potential business in the long run.