I have actually never heard of a “ signing fee”. To what category is that fee assigned and is it refundable if the deal does not go through or if your offer is not accepted? Will it be deducted from the broker’s commission after the purchase is complete?
I would be very reluctant to pay anyone a signing fee but it is possible that a fee like that is common in some markets. I have recently purchased or sold property in 4 states and have never been charged such a fee. I would ask around among your friends and call other brokerages to see what their requirements are in the way of fees.
I am afraid that isn’t much help but perhaps it gives you pause before you pay it.