Arsenal look likely to let Eddie Nketiah leave this summer, and talks are ongoing over a loan deal with an obligation to buy with Marseille. Nketiah is reportedly keen on a move to the Ligue 1 side, where he would replace former Arsenal captain Pierre-Emerick Aubameyang. However, a problem has arisen as Marseille and Arsenal are miles apart in their valuation of Nketiah. Arsenal want a straight sale, but could be willing to accept a loan with an obligation to buy. Marseille want to sign him with an option to buy, and at a much lower fee than Arsenal would like for the 25-year-old. Arsenal set …