I bought Maxfoot’s MF-17 Ebike for my son 2 years ago. It has proven to be a good choice since it is highly functional and easy for his daily transmute to school. The brand is well-known for its strong material and reliable bikes. My son wants an upgrade to MF-18 now. I have come to know they are having a $100 discount on MF-18 with this coupon code: GPHM. Is it true?