This is a difficult question to answer because curiosity about the prints is higher than the demand for them. Most of the interest has been generated by people discovering pictures in attics and basements or at garage sales and hoping they've stumbled onto a treasure. The reality is Ullman Mfg. Co. mass produced lots and lots of prints and photographs, and distributed them widely. Some prints may be easier to find than others, however.
Bear in mind the value of an item is dictated by how readily available it is in the marketplace at the time a person decides to buy, how much the buyer wants the print, and competition from other buyers. If someone documents the available prints and other ephemera, collectors may show more interest, leading to an increase in value.
In general, Ullman framed lithographs sell for $35-90 in online auctions and on commercial websites, and a sometimes for a little more, $115-140, at live auctions. Antique stores tend to overprice the merchandise: recent [December 2010] prices recorded from common prints with price tags of $195 (Swinburne Seascape) to $375 (Priscilla, "Why don't you speak for yourself, John?"). To put this in perspective, the identical framed Priscilla image sold at auction for $80 in 2006, and for $25 in 2008.
Ullman postcards are also plentiful and cheap, ranging in price from $2-20, with most selling in the $4-10 range. Due to the wide variety they're inexpensive and fun to collect, but they have virtually no investment value at this time.
in late 1800s and early 1900s the industrial revolution took place
the late 1800s to the early 1900s
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The Industrial Revolution started in England around 1760, beginning in the mid-to-late 1800s and early 1900s felt a racial superiority.
david ricardo
in the 1800s, why were many labor strikes unsuccessful?
The Ottoman Empire.
penis
between late 1800s and early 1900s
vah
It depends how early: 1700s: agriculture 1800s: Railroads 1900s: cars.
which factor limited the growth of union membership among the unskilled worker during the late 1800s and the early 1900s