If your plan is for RX only on marine VHF, it's probably just as easy to program the channels in as RX only and go with the standard 2 meter only model that you know for sure came form Icom.
I'd be wary of eBay, and absolutely avoid Alibaba, there's a lot of bootleg radios out there. Getting proper programming software or warranty repair will be a challenge.
If you are planning on actually using it for marine VHF use, as in transmitting, they won't have the necessary FCC certification for use in the USA. They are also missing some of the features that you should absolutely have on a marine VHF radio if you are using it on a boat.