Only intended to replace water fill mechanism. Ended up replacing all the tank parts.

 All the seals had hardened up, mounting bolts corroded. 

It had not been used in about four months, water fill mechanism busted so I just turned off the water.

Turned out to be more work than expected.

Something I did not feel like doing but worked on it anyhow. 

Probably a $200.00 job if I called a plumbing outfit.

All replacement parts cost about $50.00