Also if you scroll down to “Special offers…” you’ll see various choices to get a free kg of PLA.  There are also 2kg bundles that have 50% off promo codes and also have 20% off coupons.  So 1kg silk PLA free, or 2kg other PLA for around $11 to add to printer.  Just pick which one, collect coupon from product page if there is one, add both to card, and enter appropriate promo code for you choice.