Sorry if this isn't allowed (understandable if you remove it) but I think this is too niche of a product to put on ebay so I don't know where else to try to sell it.
I've got the OVMS v3.1 Base Module (Wifi/Bluetooth) fasttech Item# 9652892 with the cord (Nissan Leaf OBD-II to DB9 Data Cable for OVMS Item# 1779000) and the GSM Antenna
(Item# 1000500). I got them back in June 2018. I don't have the 3G modem, I just always used an old phone as a hotspot with the module's wifi.
I'd sell the package for $60 delivered to the lower 48 states. Anywhere else, extra.