I'm not sure why people buy corrupt dragon anyway. Seems like a waste of cash to me. Because Corrupt dragons are the best F2P armour. PKers purchase the weapons to OSRS Gold aid in getting kills and clanners buy the armour in order to tank longer. What if it doesn't disappear after something like 30 minutes?

Sure, but it also depends on how you use it. For example, if you're taking PKs and using only the weapon of a dragon that is corrupt to deliver the final blow then your weapon is going to last several years. The one or two great strikes are the difference between killing or getting killed. When you add the drop(s) you'll get, assuming your PKing, it's almost certain to compensate for the cost in Corrupt Dragon.

Especially if you are a professional Pker such as Mic. Then you make quite the profit. Also, the street price was 25M (Leaf was the one who bought the boots) however, the GE cost was $8M? It was thought to be the same. It appears that you cannot put money in a bank account now. Most people will simply store it inside their bags.

You've had this information discussed to you. This is the amount at which a buyer is prepared to pay for an item. This GE price is simply an automatic way of recording transactions and updating the price according to that. Why do you think GE prices fluctuate? Because people buy and sell at street prices via the GE and it changes the price to reflect this.

Since I re-joined RS some months ago when I finally joined I've been noticing a significant amount of players (mainly around the GEx) begging for money. Personally, I've never had more than 500K to my name. I've never needed more than that and I've never set out to Buy RS Gold try and make money.