TigerDirect offers the Seagate 2TB Serial ATA 6Gb/s 3.5" Solid State Hybrid Hard Drive with 8GB SSD, model no. ST2000DX001, for $129.99. This $30 mail-in rebate drops it to $99.99. With around $4 for shipping, that's $0.05/GB and the lowest Black Friday mention. It features a 64MB cache. Rebate expires January 12.
Frugal isn't smart if you put off replacing these things. Waiting too long can cost money or even endanger your health.