Infinity IRS Beta

"But they may not fit in the next home."

Make them fit.  Those are the type of speaker you get, figure out the details later, as your wife frowns and shakes her head.

They are now 30 years old. $10K new. I don't think speakers hold value as a vintage car-even if they are immaculate. Maybe there are a few exceptions?

Value is a subjective thing, like the rest of audio.
http://www.ebay.com/bhp/infinity-irs

Ebay listings are all over the place. I wouldn't open my wallet for over $5K....I think 5K is a stretch.

Thank you for the feedback tablejockey. And yes, wife isn’t nearly impressed as I. 

Ebay is indeed all over the place. I don’t think they will bring what I’m seeing 
them on eBay for. $5k is probably right 

5K is going price for a set of deltas , 10K is about going price for Betas ! I’ve got both . I shipped them to Oz from the US & the betas set up with the right gear extremely important will out perform some modern speakers going for 250K with the same gear running them. 8 12” graphite servo controlled woofers move some air & extend way down like very very few speaker systems will! But don’t get them if you can’t afford A class tubes for the top with decent interconnects & speaker cables , avoid silver they are already extremely detailed & crisp copper to soften. I think if they in good working order they are great bang for your buck but they are in the serious end of audiophile town