Service Inter Agency. The concept is simple : the estate agencies of the same geographical area gather their files in order to propose a total real offer to their customers.
Advantages :
For the salesman : the salesman has the customer file of all SIA agencies, and this, free. He signs one mandate, with one interlocutor but increases his chances to sell thanks to the number of agencies.
For the purchaser : entering an agency SIA, he will have access to the whole of the goods held by all the associated agencies. Moreover, the offers suggested are SIA exclusivities that he will not find anywhere else.