Snell Type A II Speakers

I have a pair of Snell Type A II speakers.  Does anyone have an idea of what they might be worth.  They appear to be in pristine condition,but have been stored indoors at a friends house for the past ten years. I no longer have the electronic crossover unit  they originally came with.I am considering moving to my home to test and then sell.  Will they work without the electronic crossover? Any suggestions?