I think that if it's something you need to add to your catalogue I can understand being willing to pay quite a lot since you haven't come across the item yet.
I almost got scammed this way when I first tried to sell TBT bells here...
A user offered 700k for 800 TBT bells and the next offered 1mil or so if I remember well,
the third poster was kind enough to tell me the rate.
I had not specifieda price but I had said that I was new to this and asked "for reasonable offers, please". I thought I could trust everyone.
I wouldn't dare try to rip off someone like this, I see no advantage in doing so as it will be there for everyone to see, and it's shameful.
I am the most honest person you will ever meet and I'm not even joking. If you ask me questions I would give an honest answer xD I am a kind person and I would never do anything that would make other members unhappy. =)