Why has the Australia Post Domestic Regular Letter Untracked option suddenly disappeared

[qpa757]

I regularly list new items to sell on Ebay and in the last 24 hours the option - Australia Post Domestic Regular Letter Untracked - is no longer available. I can't list anything without tracking on postage. 

[lezned-toycollector]

No issues here. I've just listed 20 odd DVDs with Australia Post Domestic Regular Letter Untracked.

[qpa757]

Thanks for this suggestion. Very helpful