Even a SATA SSD...
...can give new live to an older machine.
Bit of extra RAM, new SSD and longevity is increased.
Just wish prices would start to fall now for the higher capacities. :(
A quick look on Amazon for 4TB SATA SSD's come in at between around £1,000 and £2,000
A 2.5" 4TB HDD - £100 to £130