Summary judgment for defendant-purchasers against plaintiff-sellers is affirmed, where: 1) when sellers of real estate accept a deed of trust from the purchasers to secure the purchase price, Code of Civil Procedure section 580b prohibits the sellers from obtaining a deficiency judgment in the event the purchasers' default; 2) it does not matter that such a trust deed is given to sellers after the close of escrow, as timing does not change its character; and here, 3) the plaintiffs' trust deed secured a portion of the purchase price so section 580b bars their action.