To echo the others, I had a similar problem though I was on a 2011 MBP. Didn't want the new MBP so I bought the most pimped out 2015 model you could get, the one with the 2.8Ghz i7 CPU, AMD GPU and 1TB SSD. Also had a low battery cycle count (<50).

Plan to use this one for at least another 5 years. It's still plenty fast.