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Confused by broker multibuy option

Author
Norello Tusk
School of Applied Knowledge
Caldari State
#1 - 2017-01-03 19:43:59 UTC
When using the option to buy multiple items at once the price paid can be more than the listed price. For example I have the invention window open for something that requires 18 datacore - high energy physics. The lowest price is 100,00 for 16 of them, the next higest price is 103,248.96. When I use the option to buy all the items at once it wants to sell me every datacore for 103,248.96. I thought it would charge 100,000 for the first 16 then 103,248.96 for the next 2.

Is it supposed to work this way? I assume this explains why some of the items I had listed on the broker sold for more than the asking price?
Chainsaw Plankton
FaDoyToy
#2 - 2017-01-03 19:48:12 UTC
the system is lazy, it will spend whatever it has to spend to buy all the mods at the same price, don't like it buy the stuff yourself.

@ChainsawPlankto on twitter

Memphis Baas
#3 - 2017-01-03 19:51:03 UTC
I think the multibuy window uses the same code as the single buy window.

If you try to buy just the datacores, you can right-click on the 10 and buy them, then right-click on the other ones and buy 2.

If you want to force it to give you 18 with one OK, you have to specify the higher price (103,248.96), and it will pay that to the first seller for 10, then pay that to the second seller for 2 more. Basically, free bonus to the first seller.

This was coded this way a long time ago, if not from the beginning in 2003, in order to discourage RMT'ers from posting 1 tritanium for 1 billion ISK and being able to right-click the order and direct where the ISK actually goes.

Basically, no matter what you pay, it always goes to the cheapest order first, and the computer won't correct the price you're willing to pay. If that's what you want to pay, that's what it delivers to the first guy.

This is why people 0.01 each other in Jita so fiercely (only the cheapest order actually sells).
Norello Tusk
School of Applied Knowledge
Caldari State
#4 - 2017-01-03 20:09:07 UTC
Thank you for the quick replies. That explanation clarified the issue. When the price difference is significant enough to annoy me I'll place orders of a quantity matching the lowest price and work my way up.

It seems like an odd system but I wont complain as I've made more isk than I lost from it.