There is an in-game currency on Lectron. Using this currency, you can buy and sell with other players. As mentioned earlier, you can check your current balance by typing /balance. To earn money, you can buy and sell in the main city, or complete jobs. Jobs are an easy and simple way to earn money! You can earn quite a lot. Using the methods provided below, you can earn more money too. It's really important to have a balance as it's what keeps you going. You can use /ah, /shop, and /trade to exchange money and items between other players. You can also earn money from the server by joining a job with /jobs. Below are links to tutorials for each command.
Trading - http://minecraft.lectron.com/trade
Auction House - http://minecraft.lectron.com/auction