I'm not really sure what a reasonable price is on one of these, so it's possible (as I've only just recently capped a character for the first time) that I can't afford it. I've been watching the AH for something, and asked in the Trade channel a couple of times, but really not finding anything. I am only interested in staffs, to take advantage of my character's kensai specialization and 20% staff alacrity from Acro 2.
But I would like a Holy (Burst), Anarchic (Burst), or True Chaos of Greater Construct Bane quarterstaff. Any racial restriction is okay. If I have to choose between either a burst version or one with a high + value, I'd go with the high + to benefit more from glancing blows.
The amount I'd be willing to pay would vary depending on what kind of staff you have, obviously, but it's probably going to have to be in plat; I don't have much else of much value. I would be willing to pay on the order of 500000 pp for a really nice specimen (+4 or 5 Holy of GCB, for example). I don't know if that's a reasonable offer?