Yes, there is a market for gas station building porcelain panels. Condition and location are a serious issue for buyers. Not every petroliana collector could make use of them, but some would love to reconstruct a station or just one wall on their property.

Type "porcelain panel" in the Google Custom Search form on the top right corner of this page to see more info.
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Jim "Oldgas" Potts
Your host and moderator