Newegg has great prices on a few Desktop Memory. Shipping is free.

• 16GB (2x8GB) G.SKILL Ripjaws V Series DDR4 2400 Desktop Memory (F4-2400C15D-16GVB) $52.19 w/ promo code PAXMEM10
• 16GB (2x8GB) Corsair Vengeance LPX DDR4 2400 Desktop Memory (CMK16GX4M2A2400C16R) $57.99
• 16GB (2x8GB) G.SKILL Ripjaws V Series DDR4 2666 Desktop Memory (F4-2666C15D-16GVR) $60.29 w/ promo code PAXMEM10
• 16GB (2x8GB) G.SKILL Ripjaws V Series DDR4 3000 Desktop Memory (F4-3000C15D-16GVR) $64.79 w/ promo code PAXMEM10
• 16GB (2x8GB) Corsair Vengeance LPX DDR4 3000 Desktop Memory (CMK16GX4M2B3000C15R) $64.99
• 16GB (2x8GB) Mushkin Enhanced ECO2 DDR3L 1600 Desktop Memory (997031E) $49.99