Here's a link to a current eBay listing for this item, offered as "Buy it Now" for $12.75 (relisted after being offered for auction at minimum bid $7.75): SnoopyPot
"This adorable Snoopy vase or planter is in excellent condition. The bottom is marked "Snoopy Copr. 1958 United Feature Syndicate, Inc. Another Determined Production". There is a red sticker that reads "Made In Japan". The planter measures about 3 1/2 inches tall."
Odd it didn’t come up in search results since snoopy planter was a search term I used. Oh well, I appreciate your effort. I’m surprised it isn’t worth a little more. I was mostly curious.