Are you still looking for one of these?
I have a Surface Pro 3, i5, 4GB RAM, 128GB SSD. It’s a few years old and it does have some wear marks on it. There is also a tiny chip / dent on the bottom left hand side (not visible when the keyboard is attached).
Comes with original PSU, Pen and Cover keyboard (the keys have become shiny from wear, but you can pick up a replacement quite cheaply).
Can post more info, spec and asking price, was going to list it later this afternoon.