The Bukkit plugin "Auctions" you simply type /auc start (item name or I.D.) (Amount of the item) (price to be set for the first bid) (Bid raise amount)
Minecraft's Item ID's can be found on Minecraft Wiki. Link in related links.
the first eBay item offer for auction was a broken laser pointer
No, you can't take one item from a Minecraft mod unless there is a separate mod which contains that one item.
If you have the winning bid at an auction, then you have won that item with the bid you placed. After you pay for the item, it will be transferred to you.
lot
lot
The item ID for a diamond pick in Minecraft is 278. I have linked you below in the related links of a full list of all the ID's in Minecraft.
Minecraft
If an item has a reserve price at an auction it means no matter the amount bid it will not sell unless it reaches the reserve price set by the seller. This price is not known by the bidder. In a no reserve auction the item will sell by the highest amount bid on the item this is known as a true auction.
A forward auction is the "ordinary auction" we are all used to today. In a forward auction, the buyer bids on the sellers item, and the prices of the item increases during the auction. On the other hand, a reverse auction switches the roles of the buyer and the seller. In a reverse auction, the sellers are competing for the buyers business, and the prices of the items the sellers are selling decrease during the auction.
46
You can't.