can some1 give advise on this trade.

i am doing a trade with someone, i want her flamberge and she wants my storm bow. but the trade doesnt feel equal. can somebody give advise on how much each are worth. and how much money on either parties side should be added to make the deal equal. here is a screen shot of the trade.

(we havent traded yet, but made plans to do so later today.)
if there is alot of replies on this thread about this then ill will take the advise of the majority<if there is a disagreement on the prices of these items>
thx much