Haldor the merchant has had his stock in trade seriously expanded on our Server

You can buy most items from him, if you have the coin.

He will also buy nearly everything from you that is not on your Hotbar.

Haldor's Cash has endless cash.

The prices he charges and pays are dynamic based on trading activity. If activity on an item stops it will slowly revert to the default value.

The more you sell, the less he pays. The more you buy, the more he charges.

There are regular pricing updates in the Discord channel #sunshine-alley-gazette

When buying from him you can double left click an item to increase the quantity up to a full stack, or the amount of gold you have, whichever is less.

When selling to him he buys single stack slots at a time. Break stacks apart before engaging him if you only want to sell a partial stack.
It is strongly recommended that you remove everything from your pack you do not want to sell, especially enchanted items.

There is a search bar. Use it as Haldor's inventory is not sorted, either alphabetically or any other way that makes sense to anyone that isn't a Dverger

Portals to Haldor are both at the Town and the Portal Hub

He also has a Public portal which you can link to a Personal Portal for multiple shopping trips