Remember when getting organic traffic was easier and there was no such thing as a penalty? Early on with AdWords I could buy traffic for a nickel a click. I miss those days.
Look. Nothing converts like search. People search when they are ready to buy. Even for inexpensive impulse purchases they may come back several times before pulling out their wallets. They and your business used to count on searching each of those times.
Alas, those days only exist in your dreams now. If you want to get sales back to what they once were, you can not rely on search alone. It is time to get serious about learning multi-step marketing and developing multiple marketing channels.