Well I dont know how much it costs, I actually bought the 55-250 but a friend broke it and they had to buy me a new one so they bought me the 70-300.
I took some samples with it, but not serious ones, I havent been out of my house to take some good photos yet, so I dont think I can judge the quality at the moment.
but I liked the 50mm quality though. (got this one as a birthday gift, lol.)