Are you in the US? Might still be able to get a PAL machine from someone state-side.
Do you have an extra 100 to spend? If so, you can get an external scan doubler that works great with a normal PC monitor.
The reason I ask is that the majority of games are in PAL format, and will work poorly, if at all, on an NTSC machine.
EDIT: For games and demo's, a 500 or 1200 is probably your best bets. A 500 is more compatible with truly classic stuff, but a 1200 will run most, and its far easier to transfer files to and from it.