It's this model
It has a Haswell Celeron processor 1.4Mz processor, 2GB memory and 16GB solid state drive (the drive but not the memory is upgradeable).
Best Buy has a NEW slightly different version of the same Acer Chromebook for $179 on sale
TigerDirect sells a refurbished model of the exact same C720-2827 for $159.99
The Groupon link ishere