Last month Crucial introduced their P2 NVMe SSD series as their new low-cost successor to their prior P1 series. The Crucial P2 500GB NVMe solid-state drive retails for $60~65 USD which offers good value and yields better performance than their prior low-cost P1 SSDs.
Source: Phoronix – Crucial P2 Performance On Ubuntu Linux – An Affordable 500GB NVMe SSD