It's not actually 1.7.2, there was a note on the Bukkit forums warning about such servers.

with freaking lasers

Quote from: Darkwings on  7 Nov 2013, 20:34:25

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Some questions not answered by the tiny video:
-What is the limit of stacks that can be stored into the "collection" inventory?
-Do unsold items go into the same "collection" inventory as bought items?
-Is there a time limit of any sort to retrieve such item?
-Do we get the fee back if the auction expires?

Both the deposit and collection inventories have no limit to the number of items you can store in them. Items awaiting collection will simply queue up until you give more space in the in-game collection chest. There is also no given time limit for collecting these items, they will simply be sat there waiting for you the next time you come online. If there is no winner of an auction the item will be sent back to you awaiting collection. Also if you put an item into the web inventory and later decide you don't want to auction it you can simply drag it over into the collection inventory and it will then be sat waiting for you in-game.

As for the fees; the fixed 25-100Nbz fee is charged as you put the item up for auction and is a cost for listing the item in the Auction House, this will not be refunded, the 5% fee however will not be charged as 5% of nothing is still nothing.

Hopefully that answers your questions.