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The advantage of an external keyboard is the included number pad. The one feature I miss on a MBP of any size is the lack of a number pad (and Microsoft Excel).
 
Much better way not to lose money: don't buy anything with it in the first place, especially not tech. Computers lose value with time more than anything, so not using parts of your laptop that you paid for in the first place will never increase its value more than what you lose with age, anyway. Using an external desktop setup makes sense for other reasons, but keeping your laptop in better condition is not at all a factor in my choice to do that.
 
It makes a grand total of zero sense. The increased resell value is less than the value of the external keyboard and monitor. I use those because it's much better than using the laptop's, but just for resell value...
It also stops you using it as a laptop.
If you want to use it on a desk the whole time, don't buy a laptop.
Zero sense.
 
I’m always looking for ways to worry less especially about things that don’t matter.
Keyboard usage counts as doesn’t matter.
 
This reminds me of someone who drives 4 miles out of their way to save a nickel on a candy bar. :)
 
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