Hi, I've got a vocal isolation booth ("sound isolation enclosure") called a Whisperroom 4260S. My wife and I are downsizing and I need to find a new owner for it so we can move into a smaller house.
This unit is ideal for anyone recording voice-overs, whether you're a voice actor yourself or a sound engineer or producer. It's also good as a practice space for musicians who live in apartments.
Here's the webpage for Whisperroom that shows this production line, with more details:
I paid about $3500 for this several years ago, plus about $500 in shipping (they're very heavy - several hundred pounds). It's in near perfect condition, and I'm ready to give it away for a token pittance to anyone who's willing and able to come take it apart and transport it away.
Contact me if you have an interest, and we can talk about the details.