Old American glass bottles made in the 1600-1700 for elixirs and portents are the most costly, forget the mass produced bottles and scavenge dumps and river banks where people disposed of their garbage. Out house diggings is a new field for collectors, people 200 years ago dropped darn knows what down the hole as they went about their business.
Today people accidentally loose rings, or other jewelery into the city sewers, cell phones etc.
A small glass works from 200 years ago that now someone finds just one bottle intact, Big Money.
I have some glassware Alpha, but only for the way it looks. All old stuff. All of it is utilitarian stuff (jars, etc), and was not for decorative purposes originally.
On another note, I recently dug all of this stuff out from behind my brother's late 19th century home. He originally thought it was a sinkhole, but I arrived with a shovel.
This is the lion's share, although still more different colored bottles and stuff is not in the pictures. Most are cork lid, or other strange attachments. A few still had what is left of the lids intact, so I left them. Most that have the lid are some sort of weird wire pinched contraption holding a (metal?) lid to the lip of the glass:
The light bulb is a GE MAZDA, which they quit manufacturing in 1945. Sadly, it didn't work when I screwed it into a socket. The porcelain adapter next to the bulb has the plug ends vertical to each other, not parallel. I also found an old 1920s bicycle pedal, a rather large vacuum tube from the late 1920s, some old marbles, and other things not pictured.