Hi, this is common and customary here. An earnest money deposit goes with the contract offer and is initially held by the selling agent's broker in escrow until the seller signs, then it goes to the settlement agent (title company) escrow acount.
This is not the down payment required for the ltv amount for loan purposes, like 10%. It is a smaller amount that may be requested by the seller or listing agent and suggested by the selling agent. The specific amount is never suggested by the selling agent but they will give an example, saying something like; "usually people provide between a thousand and fifteen hundred" or more on large priced homes over 200K. The amount is only to cover initial expenses, mainly title search and perhaps inspections that the seller must provide, in the event the buyer fails, the seller is not out any money. And yes, here, the seller provides proof of good title, which means the title search,buyer pays for the title policy.
I suggest you check around at other real estate companies or call title companies and see what is customary in that area.
Good luck!