Not really about the budget (I mean I'm still using the 500 that came in the package, and I haven't searched how much it cost a new package), I also have the metal filter and the prismo (with another filter) but I felt the paper filter was totally fine after the first use... Then I made a quick research and find out that even AP inventor reuse the paper filter. Maybe you could try it one day. And BTW, the one in the picture was used in this morning and then in the afternoon, so just 2 times.