ODOND
There are several companies who do resales, most of them in French and many resales are handled by local normal estate agents. There are also some leaseback resale sites in English. Like this one:
French leaseback
Note the resale value of a leaseback during a lease is related to the current rent and not to the value of a similar normal property in the same location. So if you sell during a lease you will make little or no growth. But resales can be particularly well priced because of this issue.