You really should not... "question someone on value"... in a sales thread. Asking for confirmation of the typo is all that's necessary. Asking for the definition or meaning of a word you're not familiar with is fine too. But you should never question the actual dollar amount.
Anyway, the domain is domantalk.com and a quick look at the user's other threads will confirm this.
It will also show the question has been asked and answered before. He has several 'doman' domains for sell as typos.
It's amazing the trouble and confusion that 10 seconds of searching can prevent. Try it sometime.