I see this also listed on ebay and it tempts me just for curiosity's sake - but I find the notion of being quite so format-limited kinda scary. (ONLY .RB files...wow.)
Do you have any of the super-duper software to make things easier ?
Perhaps a smartmedia card to go with it (does anyone even sell those anymore ?).
I am really happy with my Jetbook but after a year it is getting worn out and I want better PDF support - BUT - I would offer $20 for this, shipped USPS/cheapest with $20 insurance just so they will make sure to deliver it whole...not to be insulting or anything !
(A new Jetbook can be had for a mere $89 + freeship these days...and cheap Android devices are going to take over the world !)