As soon as you accept an offer for someone to buy your home, the buyer has to send over an all-cash good faith deposit.
This deposit is typically 3% of the purchase price of the property and is held by the escrow company in an escrow account just in case the buyer breaches the contract and you want to try to collect for damages.
If the buyer wants to send over anything but cash as their deposit, say no!
I have heard of buyers trying to use necklaces, #Rolex watches, and all types of other items for their deposit.
There are a few problems with this.
1) Will the escrow company hold a physical item as a deposit?
2) What is the true appraised value of the item?
3) Is that item real and authentic?
Because so many problems can arise out of this, only accept cash as your deposit.
If the buyer refuses, find yourself another buyer.