Correct, they are "apothecary weights". The strange symbols, such as 3, backwards e, cursive z and others, are all the traditional symbols for the weights denoted on them. These symbols date back to ancient Greek and Roman medical texts. Wikipedia
Yes, apothecary weights do sell, especially if they can be dated to a particular time and place of manufacture.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis