it would be easier if you just want any kind of -5 energy axe/sword
and you should stat looking for -5 energy offhands so that ppl would know better what you looking for. Even though you get -2 energy eventually but most ppl dont know that
If none of those meet your criteria I have a -5 energy Fellblade I'll let go for 60K. More than it's probably worth, but I'm not in a big hurry to sell unless someone wants it more than I do.
I did spam ingame, only people who PM me have a perfect sundering (I don't know why, sundering sucks ass) and +30 HP... it's also 15%, they want like 75 plat.