The "street" prices of Malaysian sets on lelong.my are below RM 1200/=. Reference: Nexus 7 lte price Malaysia, harga, wts in Lelong
Unless there is a way to verify they are indeed MY sets, there is a risk they are US import sets instead (no warranty, and LTE band 7 support).
Just compare them against official prices, and you should be good to go. The next qestion to ask is, do MY sets come with 'regional' warranty, and will be covered by the SG service center, or are they MY warranty only?
thanks 