At about $150 for a 2gb RAM/16gb EMMC Pinephone(out of stock until sept) is is almost a cheap as I have been seeing used N900s anymore. The 3/32GB version which includes a USB/HDMI/ethernet dock is $200. So not that expensive but it is important to note that even Mobian(Debian Mobile) is still pretty beta version but progressing. It is only a hacker phone for now like the Nokia 770 was perhaps rougher as it is a community built OS working towards Debian grade reliability. I will not assume your personal economics but it is a pretty good deal for hyper-custom hardware, just remember right now it is all super alpha/beta not a consumer commodity product. I am still using my N900 for everyday stuff like phone calls and audio books.