Everyone knows that modding is not cheap. If you want to build a really good mod, you will have to use really good equipment. Now, dont get me wrong. Im not saying that mods cannot be done on the cheap. They can, absolutely. But the cards will be stacked against you if you do not have some really eye catching and well used equipment. So, how do you go about finding the best deal?
Just keep your head on a swivel and read the modding sites religiously. You will see when they go on sale! Find a vendor or two and suppor them regularly with the most important thing that they need. Your money and your support.