Coop 1031 exhange by the sponsor

JB:

!. I looked into this years ago
2. I believe that thr IRS treats leases of more than 30 years, which is your typical Coop lease
3. as real property for purposes of IRC section 1031
4. you can also swap coop for coop
5. if there are left-overs please let me know
6. especially if they're rent-stabiliuzed or controlled
7. I also might want to trade

What I am wondering about is whether being the sponsor of the coop affects whether an exchange can be done. there is an exclusion in the rule about properties primarily for sale. Does the fact that it has been rented for years affect whether the property is considred primarily for sale or would it then be considered property used in trade or business?