If you want to express that a certain product is available at a discounted price, you can use various synonyms for the phrase "on sale at." Some useful expressions include "marked down," "reduced," "discounted," "price slashed," "at a cut rate," "inexpensive," "bargain-priced," and "clearance-priced." By using these synonyms, you can add variety and clarity to your language while indicating that the product is available at a special price. You can also use these phrases to convey a sense of urgency and encourage customers to act quickly before the sale ends. Whether you're promoting a sale or shopping for deals, these synonyms can help you communicate the value and affordability of a product.