A lot of basics in the economy range from 50k-300k, the only things that will cost millions are the .03 drops such as cards. In my opinion, it's completely understandable to have say a swordfish card range at 4mil for the simple fact that people have to kill thousands to get one. Despite the millions range in the economy, you can easily make 150k a trip, once you reach the 70s level(a lot of times even lower) on a class that opts to not use potions constantly.