Firstly, it allows a buyer finding it difficult to find finance, because of insufficient guarantees, to take control of the business until they do so.
After having proven their management ability, it will be easier to claim for finance without a guarantee.
A buyer lacking finance can use a bank, which will take shares and rent them for a long period.
This arrangement can of course also be considered with a capital investor.
Next, renting will allow the seller to avoid the possible negative effects of a liability and asset warranty.