The Senior Account you're selling should take 6-8 months to become a Hero if I did my maths right. 0.25 seems like a reasonable price, but since it is in a signature campaign, could you give us an idea on when we will get our ROI, assuming that we are still in the campaign? And I'm also assuming that the post quality is high as it is in a sig campaign?
Currently it's in signature campaign 25 constructive posts/week/0.4BTC -> 0.4 Bonus after joined every 4 weeks.
Then it's means 0.2 BTC/Months ROI in 1 Month and 2 weeks with 100 constructive posts/month.