Clefs is the French word for 'keys'. It is short and marketable.
This domain name would be of interest to a locksmith or similar business based in, or selling to, French clients and therefore would be a valuable domain name for such a business or as part of your own domain portfolio for re-sale.
Namebio.com indicates clef.fr previously sold for $3,695.
GoDaddy is estimating a value for clefs.org at $1,554 and clefs.com at $6,185.
Reasonable offers in this ball park will lead to a quick sale. Submit your best bid. Lease-to-own is available to help spread the cost over several months, and where low monthly cost is a factor, rental options are available.