OK, I apologize if I have offended anyone...
I don't think you've offended anyone here (that's pretty hard to do). Rather I think you're just caught up in the usual banter on this site.
Those two break barrel shotguns are worth at best about $125 each, and appear in decent condition - you should be able to get $100 a piece. I can't speak to the other guns.
The offer of $350 for them all is low in my opinion by a couple hundred dollars.