1tb+ 3.5 inch hard drive, keyboard, mouse and potentially 1155 i5

My little ‘shopping list’ is as follows:

-1tb+ hard drive, must be 3.5inch and as cheap as possible. Already have an offer in on something.
-Keyboard and mouse. Do not need to be bundle, must be decent quality and well looked after. Back lit mech keyboard is a massive pro. Would specifically like picture of these items
-Potentially looking to upgrade an socket 1155 board I recently purchased. It’s the core of a little ITX gift to my fiance. It came with a i3-2120T but I’d like 4 full cores…

1tb+ 3.5 inch hard drive, keyboard, mouse and potentially 1155 i5