Turned down a SysOp/NetOp position 6 months back due to salary lower than market. Is it time to re-open negotiations?

I applied for, and was selected for a network/sysadmin position back in October. When it came time to negotiate the salary, their starting scale was a) much lower than market, and b) almost 15k less than what I currently make. It would have been a great opportunity to move on from the dead end sysadmin position I currently hold.

The main issue was they have 2 pay scales: those holding a degree, and those without, with a 15K gap between them.

Even with over 17 years in IT, 5 as a full-time senior Network/Sys Admin with MS/Cisco/Comptia certifications, I would be forced into the lower tier.

I kindly thanked them for their time, and said I would be unable to agree to those terms.

However, 6 months later, the job is still open. According to a friend on the board of directors, the current IT director is an incompetent overpaid figurehead, and the position I applied for would be basically the owner of the department; able to fix all the things, but who has to babysit their boss.

Would you attempt to re-open negotiations? How would you go about broaching the topic of the basic fact that they screwed up with their math, and will never get anyone competent enough to do the job?

Should I even try?