I do combine shipping.  If ordering Lego Parts (not bulk listings) and LEGO Minifigures each additional item (different listing) will be $0.25. Please add items to Cart. Often multiples of the same listing will cost $0.05 - $0.25 each for shipping. If you have issues with the cart combining, simply request an invoice after the sale.

I ship USPS Ground Advantage unless you request otherwise (buyer to pay the requested shipping charges).  

I do take returns but the buyer will pay for shipping the product back to me.