I bought an Alphasmart Neo back in 2006 before Netbooks were the rage. Cost me something like $200, might have been a bit less, they'd just dropped the price, and was worth every penny.
It's a great first draft machine. AA batteries last me about 9 months to a year. Lightweight, more than any laptop at the time, and so much cheaper. Can't edit on it or do anything but write. I wanted a portable device to write on without the expense of a laptop, and it was perfect.
I still use it sometimes, even though I also have a laptop. I also bought my daughter, who was 10 at the time, an earlier version from Alphasmart off eBay. It's the model just before they developed the Neo, I think the Alphasmart 3000, that has a see-through blue shell and looks a bit like a Speak-N-Spell. It was very old with stiff keys, and worked like a charm for her. She used it to write stories on long car trips. It still works. I've written on it, too. The Neo keyboard is far superior, but the 3000 is usable.
The Neo is only about $169 dollars now, far cheaper than a Netbook. It's just important to remember that it's only for writing. You can only see a few lines at a time, so I find it impossible to edit on. It's a durable, lightweight, portable writing machine. My only cheaper option would have been pen and paper, and I can't read my handwriting. It uses a USB cord to attach to your computer to download the text from one of 8 different files. It's a brilliant little machine. You'll still have to have a computer, though. Backup frequently, save things online somewhere and maybe on a thumb drive or external media. Backups are the key to not hating technology.
I expect the Neo will last for several more years--it'll outlive this laptop, I know. When it's time to replace this old Dell, I'll probably go with a netbook of some kind that I can write and edit on, as long as the keyboard isn't too small (the Neo keyboard is full-sized). I won't give up my Neo, but if/when it eventually dies, I'm not sure whether I'll replace it if I have a lightweight netbook at that time.
Shelley