I would disagree with "There are many non-embossed CD-731 types attributed to S. McKEE but only a few have been found with the embossing."
There have been a fair number of S.McKee embossed CD 731s found. They are not as common as the unembossed CD 731s, but I think the info that "there have only been a few found with embossing" is probably very old.
Looking at the prices of them that have actually sold in the past..... I think around 300 would be around the price for that piece. Maybe more on a good day.
Very nice insulator, I think the quote was referring to the # of types found with that embossing. As Kyle stated, your insulator is not exceedingly rare but desirable. I think $300 is a little high in its condition. Congrats. Having it professionally cleaned, tumbled, is the only way to remove the sickness, don't waste your time with chemicals.
THAT IS A NICE FIND...WTG....I HAD A CRANBERRY PURPLE CD700 THREADLESS I DUG...SOLD FOR OVER 3K ABOUT 7 YEARS AGO..WHENEVER SOMEONE FINDS A NICE INSULATOR BRINGS BACK THAT EXCITING MEMORY..THANKS
I've managed to get off most of the sickness, but it still doesn't have much shine. Would it increase the value to have this piece tumbled or should I leave that up to a potential buyer?
My opinion is about $125 to $150 or so. The condition hurts a lot. If you tumble it, you would have to cut it pretty good to get out all of the ding marks and then you would probably loose a lot of the embossing since it is faint to start. The fish-eye poses a problem. You could tumble it, then pop out that eye and do an epoxy repair.
I'd probably let this one as is. If you had to pay someone to clean and repair it, you'd probably break even on this cost.
I hope the condition didn't hurt the value that significantly. The first pictures served little justice, I've tried to clean it a little in the meantime. Here's the new and improved pictures. What exactly would this color be called? It has an iced blue appearance to me.