This is a pretty random question but I am trying to figure out the the hypothetical cost of yearly trade in/upgrade of a macbook. Now apple has rolled out the give back program and you can now trade in mac/macbook/iphone/ipad/apple watch in at apple stores towards a new mac. if you go to this site https://www.apple.com/shop/trade-in...300468_&cid=aos-us-kwgo-brand--slid--product- you can check the value of your macbook towards a new mac. My 2015 rMBP 13 inch 256gb/8gb ram is worth like $575 towards a new mac( i got it certified refurbished for $1000 so thats not too bad). I am curious if lets say I had a 2016 or 2017 rMBP, and I wanted to get the latest one this year how much would get for my 2016 or 2017. This way i can create a chart to see the year to year cost if i always wanted to have the latest and greatest and trade in the previous year's model. The only catch is that you cant just look up any model and check prices, they ask for serial number. so could any of you with a very recent rMBP 13 inch check on the site and tell me the quote they gave you?