Just to clarify, the 2013 MBP is a non-retina display? If so, this is what I refer to as their "legacy" MBP and it has
not been updated since 2012 by Apple. So even though it may be a "2013 MBP" if it is this model, it was last updated 2012. If you buy one of these legacy MBP's today, brand new in the box, it was still last updated in 2012.
http://www.apple.com/shop/buy-mac/macbook-pro?product=MD101LL/A&step=config
I bought one of these NEW for my wife a little over a year ago. It's more than sufficient for typical needs (we aren't computer gamers), and hers is a little faster than mine (late 2011). Reasons I opted to purchase this for her:
1. Includes optical drive (superdrive)
2. USER can upgrade RAM as needs/desires change
3. USER can upgrade HDD (or change to SSD) as needs/desires change
4. OWC offers a solution that allows the USER to remove the optical drive & swap-in a secondary SSD drive
Price was good too. We went with a base model and student discount for less than $1,000 for a BRAND NEW unit. I fully intend to upgrade the RAM and HDD as her needs demand it. My 2011 is pushing a little over 5 years and going strong. I am considering the SSD swap on my own machine (uncertain if I will add a second drive using the optical drive upgrade or just truly do a HDD/SSD replacement).
https://eshop.macsales.com/Search/Search.cfm?Ntk=Primary&Ns=P_Popularity%7c1&Ne=5000&N=7854&Ntt=data+doubler
Overall, we are very happy with these MBP's. What I don't like about the newer retina models is they are "one & done" computers. Good model for Apple, but not for the end user as it forces them to upgrade & spend more upfront or replace their computer later on. I am interested to see if this changes before my MBP dies as right now I don't want to spend money on a computer I can't upgrade small stuff myself.