Selling level 131 account 85 dungeoneering!

Okay, so I have a level 131 account with 99 attack/strength/magic/hitpoints. It has chaotic rapier, and 90k tokens towards anything else you wish to buy in dungeoneering. He has 88 almost 89 fishing, and 97 firemaking. It has 96 defence. It also has 81 prayer. In dungeoneering I have shadow silk hood bound and I have promethium 2h. He has full void melee/mage. I don't know how much I'm selling this account for, I'm mainly just trying to get an idea of how much this account would go for. The reason for me selling is because I'm kind of done with maxed pking. I've already started a range tanker, and am having fun training it. Please tell me what you guys would offer for this account. If I get a good enough offer I will sell. I'm looking for 500mill + seeing how I have spent over 200mil + on skills, and have spent hours getting chaotic rapier and half of another chaotic weapon. Plus all the time I have spent working on attack strength hp and magic, firemaking. This account has NEVER been botted. I have spent the last 4 years working on it. So tell me your guys' offer! =)