Sencore Variable Isolation Transformer & Safety Analyzer - PowerRite II # PR570

[footlooseman]

I was talking with my co-worker who used to repair TVs in the 80s and 90s about my TV and Radio repair projects.

He asked if I had a Isolation Transformer and as of yet, all I got is a variac. He's offering a Sencore Variable Isolation Transformer & Safety Analyzer PowerRite II # PR570 but hasn't give a asking price. He was joking about them going for $400 but he not looking for that. I don't want to insult him with too low of an offer but what do you guys think would be a fair price?