The Seller may ask for something, and you may elect to give something else:
As a rule, the Deposit is a GOOD FAITH deposit and the more you put in, the stronger your offer appears.
If you are 100% committed, and you know that you are going to have to put more $$ into the Escrow, then it only matters if you renig on the deal.
If you are planning on renigging on the Deal, you shouldn't get into it in the first place.
I have seen as little as $1000; it depends.
Good luck and may God bless