Well, I found the info I was looking for. Names can drop anytime during the day

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My oppinion is that there are domain names that don't get bidded that are worth the 60$, but anyway at least there are names that don't get a bid that are good enough for development and search engine optimization. So, I think it may be worth paying 7$ for a name that noboy bidded at, it just depends of which is your business.
And well, finally I got the name I was looking for

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Ivan