Amazon has the ADATA SU800 512GB 3D-NAND 2.5 Inch SATA III High Speed Read & Write up to 560MB/s & 520MB/s Solid State Drive (ASU800SS-512GT-C) for $136.69. Looked like a good deal to me. This seems like a good option if you want 500gb today.
https://www.amazon.com/dp/B01K8A2…AzbFE
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