n16 Those purposes are: " '(1) to prevent a multiplicity of actions, (2) to prevent an overvaluation of the security, (3) to prevent the aggravation of an economic recession which would result if creditors lost their property and were also burdened with personal liability, and (4) to prevent the creditor from making an unreasonably low bid at the foreclosure sale, acquir[ing] the asset below its value, and also recover[ing] a personal judgment against the debtor.' [Citations.]" (Torrey Pines Bank v. Hoffman, supra, 231 Cal.App.3d 308, 318.)