Here is a merchant barker macro for everyone. I couldnt find on so I just wrote this one myself.

/say YOUR TEXT HERE;
/pause 5;
/ui action toolbarSlot07;
/pause 10;
/say YOUR TEXT HERE;
/pause 20;
/ui action toolbarSlot07;
/pause 5;
/macro hello

• Change bolded test to whatever fits your needs.
• The /ui action toolbarSlot##; i use to equip somehting on my toolbar such as a gun or any other object to to have it do somehitng to take up the time between chat. If you do not want this just remove the lives that contain this line.
• The name of the macro is “hello” if you do not name your macro this you must change this value to your name of choice or it will not repeat itself.
• Type /dump to turn the macro off
• Capitalization of characters is important.