Can anyone tell me much this shirt is worth?

I was given this shirt to sell on e-bay but can't find any info on it on the web. It was purchased in 1994 in a FL boutique for $450. Printed with comic strips from 1992 & 93, Charles M Shulz logo & united features syndicate 92 and 93. Manufactured by Iceberg Italy, it's a Mens Large button down dress shirt. Never worn. He told me limited edition - only 10 of these shirts manufactured but need confirmation before listing it on e-bay.Not sure what it would be worth to a collector or what I should put as a starting bid. Would appreciate any feedback or advice from someone who might know. I have several more photos with close-ups on an online album at:
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If you think you can help, please take a look and let me know what you think! Thanks! If you have any info or know collectors who would be interested in adding this to their collection you can contact me directly at sobelisa@yahoo.com.