: This is currently the most active marketplace for this model. You can find various listings, including: OnePlus 5 64GB - Black (GSM Unlocked)

: Often lists Certified Used OnePlus 5 units for about $99.00 with free shipping.

It will also only work on GSM networks, like AT&T and T-Mobile in the US (and not Verizon and Sprint). Refurbished OnePlus 5 - Reebelo

: Available from sellers like aasieltd for approximately . OnePlus 5 128GB - Black (Dual SIM) : Offers around $105.22 .

: Some sellers offer "Degoogled" or rooted versions (e.g., with Lineage OS) for around $175.99 .