Is it permissible to purchase a residential unit from a second owner, even though the first owner paid the maintenance deposit to a usurious bank?

We understand from the question that the deposit in the usurious bank will transfer ownership to the new buyer along with the residential unit. The ruling for the second owner will not differ much from the first in terms of the existence of a usurious contract whose benefit and usurious income accrue to him. We believe the questioner should avoid such units whose maintenance deposit is placed in a usurious bank and cannot be transferred to an Islamic bank, except out of dire necessity. While buying and the deposit are permissible, the problem lies in placing it in a usurious bank. If it is possible to agree on transferring the deposit to an Islamic bank, that would be better; otherwise, the usurious contract and its benefit accrue to the owner of the unit.