You can get the generally most popular camping hammock, an eno, with straps and a tarp for $70 + $20 + $80 (eno website).
You can get my favorite, the appalachian hammock with a slot for insulation during winter, with a tarp for $99 + $150 [2].
You need a sleeping bag to put in the hammock too too, but most people have those.
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You need a sleeping bag to put in the hammock too too, but most people have those. =