Embedded Device Assistance

I am working on a new project that I was hoping that some of ya’ll would be able to help me with. I am looking for suppliers for the following parts:

1. An embedded device motherboard, preferably ARM or x86 based. Not picky, but must run Linux decently, or at the very least, be able to be targeted by a C/C++ compiler.
2. Cheap LCD panels (around 5-7 inches). Can be low quality dot matrix type. Just needs to be able to display black and white text readily.
This is for a personal project building a cheap, simple eBook reader. Target price is $100.00.