Sell Order Below Vendor Value
You can’t list sells that undercut vendors, but you can place buy orders that do so.
But that’s the thing, you can’t (it says “Unit price must be higher than vendor value”), but even if you could I didn’t place a buy order, I bought out someone elses sell order.
Still confused
Some time ago it was possible to sell an item below vendor price, and to place an order with a below-vendor-price listed. They changed that behavior, but the old listed items and orders were not pruned – meaning if someone had placed an order below vendor price, or had tried to sell below vendor price, those orders/sales are still listed.
By the way, since there’s a 15% tax on selling an item, it’s possible to sell an item or fullfill an order that’s above vendor price, but that comes down to below vendor price after the 15% tax.
Read more here: http://wiki.guildwars2.com/wiki/Trade_post#Fees
(edit conflict) When the game first came out, you could place buy orders for less than vendor offer. Those orders are still on the TP (as ANet figures out how to safely remove them).
You cannot, however, actually sell to people at those below-value prices. In other words, it’s a cosmetic issue — it has no impact on actual sales others than psychological.
“Those orders are still on the TP (as ANet figures out how to safely remove them).”
Good bunch of gold out of the market, I bet whatever you want that they will stay there until gw3 :P