bird dog /finder + connector fee details please?

[A.J.Van Ho]

Hi to pros, 

let know please

-is it ok to ask the buyer 2*1% of the transaction, if you cannot negotiate(price not increased to 101%) or don't want to collect 1% fee from seller(seller keeps 100%)?

-do you introduce 1 buyer only to seller,and if not can you ask that 1 buyer 2% for exclusivity?

-any difference in fee for non/ licensed person & is 2% (possibly minus tax),from one of the sides ok?