How to use "deposit" in a sentence

"We did give him two thousand on deposit," Elliot said.

Tina said, "It was a refundable deposit."

Smiling, Tom said, "I think the deposit might not turn out to be as refundable as you thought."

"If you gave him a deposit, and if he gave you this address and claimed he lived here, then it's not very likely this Sol Fitzpatrick even owns any boat in the first place."