Hey, since the PL Player's Guide Section is really unappreciated these days, I thought it would be nice to simply include a thread here that details a list of guides made by past forum members that can be helpful.
This tends to be the most populated section alongside General Discussion. Hopefully, this will help newer players with commerce and finance in this game.

General Making Gold:
Griffinfan's Guide: http://www.spacetimestudios.com/show...How-To-Be-Rich
Whirlzap's Guide: http://www.spacetimestudios.com/show...o-Making-Money

Farming:
Physiologic's Drop Rates Analysis and Optimization: http://www.spacetimestudios.com/show...f-Luck-Elixirs
noneo's Analysis of Plasma Pyramid Gold Farming:http://www.spacetimestudios.com/show...Optimal-method
Whirlzap's Farming Bayou Boss Brawl: http://www.spacetimestudios.com/show...ou-Boss-Brawl!
Physiologic's Alien Oasis 3 Farming Guide: http://www.spacetimestudios.com/show...29-Victory-Lap
Physiologic's Balefort Sewers Farming Guide: http://www.spacetimestudios.com/show...alefort-Sewers
Whirlzap's Optimization in Farming Sandstone Caves- Underground Desert: http://www.spacetimestudios.com/show...rground-Desert

Merchanting:
Hunzzz's Merchanting Guide: http://www.spacetimestudios.com/show...de-to-Merching!!!
EVOLT's Merchanting Guide and Profit Margin Analysis: http://www.spacetimestudios.com/show...ing-a-Merchant
Apollo's Merchanting Tips: http://www.spacetimestudios.com/show...chanting-Guide

Hunzzz's [Outdated] Price Check Compendium: http://www.spacetimestudios.com/show...!!-(MAIN-PAGE)

Please check in the Player's Guide section as well! There are many guides there detailing information on any content that you can think of. Forum members have made guides on so many subjects that it's worth your time to just take an hour to read up!