It looked pretty bad but replacing it did not cure the leak.
Before I got too far...the wife /insisted/ that I call a plumber and because this looked like a major PITA job did as I was told.
Figured I was going to waste at least $500 or more but I did not feel like doing a major plumbing job.
They got out here fast and inspected everything and found a leak in the toilet itself that I had missed.
They said they could put in a new toilet for $2000 !!!!!
There were some less expensive options that were still five times higher than I could have imagined...so I figured I better cut my loss and just pay them the $80 for a service call and send them on their way.
A few hours later and an $80 Home Depot toilet and the leak is fixed.
Since my water bill has been going up recently, maybe the low water use toilet will pay for itself before too long.
$2000 for a new toilet.