Older Sony small screen B&W's

[radiotvnut]

I may be getting some older Sony B&W's from someone and wanted to see if anyone had some information on these models and what would be a fair price. The owner has not given me any idea what he wants for them. I'm supposed to see them Tuesday.

1. Sony TV-790. It's supposed to work except the horizontal hold is off.

2. Sony TV-500U. Works and has cigarette lighter plug.

3. Sony 5-307UW. Has carry case and owner's manual. All control knobs are missing except the channel knob. Has raster and sound. He claims that this was a new set that, for whatever reason, someone stole the knobs off of it.

4. Sony 5-303W. Has carry case but power cord is missing. Has audio but no vertical deflection.