Sometimes I show both sides of ONE item in ONE picture. People usually want to see both sides of what they are buying, right? Sometimes there are even 6 or 12 or 20 pictures of it. But, that doesn't change the fact that it is still just ONE item. 
MOST ARE NM or better. an occasional card might have a ding or light fuzz [example checklist #200] on a corner so I marked it all a EX or better.

See pictures for details.

Yes,

I combine shipping

The combined shipping is automatic in cart checkout.

Choose from drop down menu > Add to Cart  > Repeat > Then go to Checkout

In checkout, before you pay, you can see the shipping is adjusted now that they are in one purchase together.

Thanks!