I have received a Buyer Registration / Confidentiality agreement from a Broker Network that is asking me to be exclusive with them for any business that they introduce to me for a period of 4 years. Is this typical?

I understand that Brokers don't want a buyer or a seller to circumvent them (and that is not my intent) - so some restriction is reasonable, but 4 years felt like a lot.

What if a business is listed with multiple brokers or on multiple public websites? What if a seller terminates a relationship with a broker because they don't get the terms / price they want and then go with a different broker? Or if they take the business off the market and put it back a couple of years later with a different broker.

Will be great to get thoughts from both searchers and brokers in this community on how they see this issue and potential resolutions. Thanks.