Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
OP, two questions. If you have 500GB of space left on your iMac, why on earth would you think that you needed 2TB of space for a MacBook Pro. Also, you haven't even purchased the machine yet and you are already concerned about resale value? I'm not following at all where you are coming from here.
 
My personal take is that 1TB is plenty. If you have more data than that, you're better off keeping in on an external drive. I'm not a fan of this new T2 design and don't keep anything local on the machine that I don't have backed up on my external drive or on the cloud.
 
My experience on the 2015 MBPs is that going from 512 to 1 TB adds $25 to $50 to the price. That's probably a fraction of the original cost differential. If you're going to sell this five years down the road, SSD storage will come down in price and newer models will have twice the storage at the same price point.

If you don't need the space, don't get it if you're looking for higher resale value.

One option I'm looking at: it looks like I will have to get some kind of a hub. It may be that there are hubs that have one or more SD slots and that I could just leave the SD cards in the Hub all the time for extra storage.
2015 resale value is a bit tricky since you can upgrade the storage later yourself, that’s why there is not much price jump between buying used 2015s.
 
2015 resale value is a bit tricky since you can upgrade the storage later yourself, that’s why there is not much price jump between buying used 2015s.

I've also found that the price differential on CPU frequencies drops quite a bit too. Same thing with discrete vs integrated. The uplifts when new depreciate over time.
 
Hello
A store near me has a high spec macbook pro 16 inch with 2tb of storage. The one I ordered online has 1tb. My iMac right now that has 1 tb in it has 500gb left of space. Should I just go get the 2tb? Would the resell value be much better?
Thanks

Buy the 2TB. Alternatively you can purchase a T5 or X5 external drive
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.