Trustee Sales: Can the owner sell directly & cancel them or have any say over it?

[Jim Witten]

If a house goes into a trustee sale, and the auction date is 2 months out, do they have the right to sell privately or on the market before then, and cancel the sale?  Or does the bank/lender control it at that point?

I wanted to offer to buy some houses that have trustee sale auction dates set, and swoop in, offering the owner a cash buy, but is it possible at that point? Or do the owners not have the right anymore over their property?

Thanks