Quoted from Creagen:The only ones I've seen for sale for under $500 would be the German reproductions.
I wouldn't give $10 for one of the German ones.
If these new reproductions are as good as the regular IPB Kiss backglasses were, they will be worth $500.
I have one unused IPB Kiss backglass and a mint NOS Bally and wouldn't sell either for anything close to $500.