Hi mtimpany,
Subject to first confirming that any retailer or manufacturer on the list that you wish to visit is completely transparent (see this article) and to making sure that any mattress you are considering meets the quality/value guidelines here … the better options or possibilities I’m aware of that are in reasonable driving distance of Pottsville, PA are listed in the Allentown/Bethlehem/Easton/Lehigh Valley list here or in the Harrisburg, PA list here or in the Blakeslee/Scranton, PA list here (with some overlap between them).
Phoenix