I'll not drinving 4k display.. I'm an accountant and I don't need to see in 4k.. the surface is more for job..
For the price, I found
Sp3 i5 8gb used for 750$ CAD,
Sp4 i5 4gb used for 900$ CAD, (1 500$ new)
Sp4 i5 8gb used is 1 250$ CAD (1 950$ new)
with keyboard..
I was ready to put an extra...