The most expensive bottle I ever personally dug was from a 1850s/1860s creekbank dump next to an old stage stop.
Western blown; early 1860s deep green aqua; embossed on all four sides:
Horse Liniment
Wm. A. Clark
For Man And Beast
S.F. Cal.
Chamfered corners, sunken panels, a beautiful applied ring lip, a "double strike", bubbles throughout the glass.
About an inch away from the Horse Liniment was a black glass beer, with two large old chips out of the base but it still stands up fine. The last bottles that came out of that dump until I dug it out. This was 1975-76 over the course of almost a year of digging.
The first bottle out of the bank was a Hall's Sarsaparilla, two inches under the surface of the first swipe.