Q: Is it permissible to add the clause of “first option to buy back” when selling any anything?
A: Yes, it is permissible to add a clause giving the first seller first option to buy back in a sale agreement. But in that buy back option, the price must be left to the discretion of the seller, as in any normal sale. In other words, the first seller cannot set a price which the first buyer has to charge when selling it back to the original owner. When the time comes to sell it back to the original owner, he can charge anything he likes.
And Allah knows best.
Mufti Siraj Desai