newer models are almost always more expensive, the company has to recoup the cost of new tooling and machinery, whereas the older models have already paid for themselves (hopefully) and are now making the company some profit. the RC-5 is also made from thicker stock (.25 vs .188) but I doubt that adds more than a dollar to the production cost, 1095 is pretty cheap after all. if you want the exact reasons you should post your question on the RAT subforum, the guys over there are great and I'm sure they wouldn't mind taking a minute to answer you.