Read the following context and answer the question.
Context: it s yours , not theirs , so don t worry!. Eligible for free shipping ( us only ) on orders over $ trade - in your old me for credit toward this item ! ships same business day , unless restocking .
Question: Why is the writer offering this deal on their products , with free shipping and telling the reader not to worry ?
Answer:


They are interested in gaining the trust of the reader and getting on their good side so that they will buy more products .