True there are a great deal of different breweries . But I think it depends on the amount of actual bottles in specific exist today . And the background and history of the actual location where it was manufactured and also . Does the place have any legendary backgrounds. Does it exist today ?hemihampton said:I asked about a unknown unlisted Philadelphia blob top in here once before, Nobody heard of it or had any info on it. I said it must be rare then. They said didn't matter if it was rare or not, they said philadelphia was a big city with many breweries & probably had lots of unknown unlisted beer blobs & it was worthless because anything from Philadelphia was common & had no interest so no value. Even if only bottle known worth nothing if nobody cared they pretty much said? LEON.