Based on the context and the answer, generate a 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 .

Answer:

They want to build a rapport with their customer base by offering an introductory deal so that people will go through them more frequently .



Why is the writer offering this deal on their products , with free shipping and telling the reader not to worry ?