The text of the ad is below. It looks like these are going for at least twice as much on eBay. I have no idea if this is a good price, but I think it might be?
Yaesu FT-857D, HF/VHF/UHF mobile transceiver, includes original box, manual, Rt Systems programming software & cable, and the Yaesu YSK-857 separation kit.
I have used this radio very little,
$350
If you look at $350 as a substantial amount of money, I’d say pass.
On the other hand, if $350 is roughly equivalent to a dinner for two for you, then yolo and see what you get.
You might get something worth it and something you can flip if this isn’t the radio you ultimately want to end up with.