You asked for input on value of sign, you got some very good info which helped in your purchase, You got very LUCKY on your auction, Had you brought it to any show and put $450.00 on it, you most probably would have brought it home. NOBODY stirred you wrong on their assesments. That is the good about ebay, you very often get much more than an item is worth
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"Remember, history that is forgotten is doomed to repeat itself!"