Product Description Rewriting for Ecomerce Store

We need product descriptions rewriting so they are appealing and unique. The descriptions will be tested for uniqueness and must be at least 60% unique or will not be paid. The product descriptions must concise and well written, also I need this job ASAP 48 hours would be good, less would be even better. Their are 59 products that need writing. Each description needs to be 250-300 words.