I notice they don't post a picture of the 1,800 sf cottage. Might be a reason for that.
You can get over $30K for a regular building lot in Cumberland County. $29K for a 3 acre deep water lot? Might be a reason for that also.
Orphan Lot?
The coastal vacation areas of NC took a big hit in the market crash a few years back. Still not recovered yet. So yeah, some of those similar lots were going for $180k before the crash - and many bought some of them.
The question for any buyer is "Has the market hit bottom, is it stable or is it fixin' to take off?"