What does send to online auction mean

[emma1976bennett2013]

What does it mean when you send to online auction?

[digital*ghost]

This is an option provided all all fixed price (Buy It Now) listings, what it basically does is end the BIN listing and create a new listing for an auction, where members will have to bid to win / buy it. 

[diamondior]

This option appears under a none buy it now listing. What does it do?

[davewil1964]

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@diamondior wrote:
This option appears under a none buy it now listing. What does it do?

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It does what d*g said SEVEN years ago.

If it isn't visible now, it means that sometime in the last SEVEN years, eBay has withdrawn it.

Dates are important, especially in a fluid environment, which eBay is.