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Auctions with Buy-It-Now option

 
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mario
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Joined: 03 Oct 2006
Posts: 6487

PostPosted: Mon Feb 17, 2020 9:47 am    Post subject: Auctions with Buy-It-Now option Reply with quote

I want to clarify one important technical change to how bidding is done by Gixen on auctions that have a buy-it-now option that is lower than the user's maximum bid.

You may ask yourself - why would anyone specify their maximum bid higher than buy-it-now option instead of using the option right away? Users do this for various reasons. Sometimes they want to win the item for less than buy-it-now, but are still ready to pay more if necessary, as buy-it-now option can disappear after the first bid, if seller set it that way. Sometimes they don't notice buy-it-now option, and sometimes sellers modify the listing and add buy-it-now after users already scheduled their snipe.

The problem is - eBay does not allow auction bid higher than buy-it-now option, and having a maximum bid higher than buy-it-now used to cause failures. It's not a problem if buy-it-now option disappears after the first bid (if set so by the seller), but there is no way to know ahead of time if auction is set this way.

From now on, Gixen will, when the first bid fails due to maximum bid higher than buy-it-now, send another bid equal to (buy-it-now - 0.01). In order to allow enough time for this, any bid offset lower than 6 seconds for such auctions will be increased to 6 seconds.

I welcome all comments to this change.
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Cupid



Joined: 09 Aug 2007
Posts: 6140
Location: Bristol, UK

PostPosted: Mon Feb 17, 2020 10:06 am    Post subject: Reply with quote

OK, so what happens if:

1> there are no bidders on the listing at all yet,
2> the BIN is 10.00,
3> the Gixen snipe is scheduled at 15.00,
4> another sniper has a snipe scheduled for 2 seconds before the end at 13.00.

From what you've said, my guess is that, the 15.00 fails so Gixen submits 9.99 perhaps with 4 seconds to go until the auction ends and is winning for a second or so before the other bidders 13.00 comes in and wins (assuming the BIN was removed as a result of that 9.99 being accepted). The result being an unhappy Gixen user that has lost the item for less than the snipe amount they entered.
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Mark


Last edited by Cupid on Mon Feb 17, 2020 10:27 am; edited 1 time in total
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mario
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Joined: 03 Oct 2006
Posts: 6487

PostPosted: Mon Feb 17, 2020 10:23 am    Post subject: Reply with quote

Mark,

It's a great observation - such scenario is possible, but in practice I expect it to be very rare.

What I implemented is not a perfect solution, but it beats what is currently in place. A perfect solution can only be implemented by eBay. I am talking to someone in eBay about it, but realistically I don't expect them to change this any time soon, if ever.
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BIN
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PostPosted: Mon Feb 17, 2020 12:20 pm    Post subject: Reply with quote

You could add in one more bid whether there is a competing bid or not, of the user's top bid... so 1st attempt fails, then a bid of BIN -1c followed 1-2 seconds later by the user's actual max bid
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mario
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Joined: 03 Oct 2006
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PostPosted: Mon Feb 17, 2020 12:26 pm    Post subject: Reply with quote

I could do that, but not sure if there will be enough time left.
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vegaquarker
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PostPosted: Tue Feb 18, 2020 1:38 am    Post subject: Reply with quote

What if you add a "seconds" field for users and multiple bids for single items like IE:
BID 1: 20 seconds before bid to 12USD (in the previous example would fail and be at 9.99)
BID 2: 5 seconds before bid to 15USD (would work and overbid the 13USD sniper)

Maybe it's a clear overcomplication for rare scenarios, but idk, just giving my 2 cents here.
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MrT
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PostPosted: Wed Feb 19, 2020 7:49 pm    Post subject: Reply with quote

Hoping I didn't read it wrong, but my immediate question is: does this affect items without any BIN at time of listing (or perhaps added later?) - i.e. will we be seeing the 6 seconds added as a minimum for any bids set quicker than this for non-BIN at listing end?
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Cupid



Joined: 09 Aug 2007
Posts: 6140
Location: Bristol, UK

PostPosted: Thu Feb 20, 2020 4:51 am    Post subject: Reply with quote

My reading of
Quote:
for such auctions
is that Gixen will only increase the offset to 6 seconds when it detects an active Buy It Now option on the auction.
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PostPosted: Sat Jun 13, 2020 6:28 pm    Post subject: Reply with quote

What about placing a minimum bid before the end of the auction just to have the BIN disappear and then schedule whatever bid you want in Gixen?
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Guest






PostPosted: Sat Jun 13, 2020 7:06 pm    Post subject: Reply with quote

Of course you could end up paying more, but you could also end up paying less.
Once I did the above and the BIN disappeared of course, but then I ended up paying more than the BIN...
It is difficult, actually impossible of course, to know what is going to happen. Auctions are unpredictable. If someone is willing to pay a bit more in order to have the chance to possibly pay less, I guess it might be a solution.
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