klownstalker
First off... let me say, nice guide. Easy to follow and understand. But I do have one concern, with the exchanging on the marketplace posts... isn't that encouraging artificial inflation? Inflation was recently brought down by the new (expensive) sets and it be nice to have items inflate "naturally" for a while. I'm not trying to be mean or anything... it was just a thought.
Inflation happens when the demand for an item goes up faster than the supply for the item. If an item suddenly becomes popular, then the price will go up as more people start to buy that item. Artificial inflation happens when a group of individuals collude to purchase a lot of a single item, pushing the price up above where normal demand would place the item. (Of course, you could argue that if a lot of people agree to buy an item, that creates a real demand, not an artificial one.)
I advise people to purchase a very low priced item and to sell that item at market price, making a small but reasonable profit. This doesn't inflate the price, rather it keeps the price fairly stable. One person buying and selling alone will not create inflation. Prices change when the number of buyers and sellers don't match. The same thing happens in the housing market. If you have more buyers than sellers, the prices of houses goes up. But, if you have more sellers than buyers, the price of houses goes down. Although a virtual community, it does demonstrate the same economic principles as the real world.