Do you want a little CRT, or do you want a fancier-looking LCD?

There's a little Coby 5" black and white CRT that Radio Shack says has an A/V input jack. You can get it from J&R for $17 or so or Radio Shack for about $25 . I've got a similar TV that I keep in the hall bathroom closet (handy for tornado warnings, left over from the big storm-induced power outage of 2003). Small, CHEAP, and effective (assuming Radio Shack's correct on the A/V input, which this PDF file appears to confirm).

If you want to get fancier, there are some little LCD's. There are two more Coby's available from J&R: 5" display for $100 or 7" display for $130 .

If you're going the LCD route, I'd probably lean toward the 7" display - easier to read. If you just want CHEAP, the little CRT would at least get you into the setup menus without taking much space or cash.