Not worth your time unless you really have nothing better to do and just want to occupy yourself with anything. 3 silver profit is 0.001fg per 3 silver. Multiply 0.001fg by however many of those you bought to see your total profit. 30:1 is the ratio used in the calculation, which is a pretty common ratio if you're buying on a high pop server, even some medium servers from the big sellers. Then, take a look at your time spent and determine if it's worth it or you're just keeping yourself occupied with something