Battery power supply for sale

We have a like-new EcoFlow DeltaPro portable power station: 3600 watt system. Used on only 3 wekend trips. We sized this unit to power an apartment sized refridgerator for 4 days. The Transit tranny went goodbye and we are no longer pursuing the van life. Paid $3200 new last August; always stored in the house. Asking $1600. Located near Keene, NH.