Budget decks for Dummies

Now, my first post is not meant to be disrespectful at all. It is just that, as I look at people dueling and see the cards they play, I am amazed by how many people play "expensive" cards. It appalls me.

Before I continue, I feel I must define an "expensive" card. When I say expensive, I mean a card worth more then $20. For example, an original TDGS-EN040 Ghost Rare Stardust Dragon has sold for $46.01US on eBay. This. Is. Insane. Now, I do not say that Stardust is not a good card, it is awesome. but $46 for ONE CARD IS OUTRAGEOUS. I just hate that.

Konami has done well in the last few years making Structure Decks competitive. A great example is Machina Mayhem. Buy 3 Machina Mayhem ($60 total), add in one Marik Structure ($20 more) for a few staples, remove the Machina Forces, cut to 40 cards with 3 Fortresses, and you have a decent deck. $80 for a whole deck is not bad but not cheap. But this is better then paying $50 for ONE CARD. This is my first rant, tell me what you think.