My pet peeve about Halloween is mean people.
And people that use Halloween as a reason to get wasted and "party" in very vulgar or tasteless costumes. I get sexy costumes, but use a little imagination and you can still do sexy with a little class and imagination.
According to the forum rules, price must be listed. If you don't have a firm number, you can put "or best offer" (OBO), but you have to post a price. It would also be a good idea to post zip code and box sizing if you will be shipping, or let folks know it is local pickup only.
Ohhh. I am not sure I'd want to take those through in my bags because you never know how well TSA will get that they are just props and not freak out about things that look like human skulls. :D
Are they paper maché? If so, it should be obvious, and I'd just make sure to mention you have some Halloween decorations in your bag and tell them you have no problem if they want to take them out to examine. Be VERY polite and smile and I'm pretty sure they'll not get weird about it. Good luck!! :)