![]() Woodstock The second major series (The HP-21 through HP-29). (HP wasn't sure at the time whether there was really a market for the HP-35.) Classic Printers The HP-46 and HP-81. This name was probably given well after the fact. These names are HP's own code-names for the product lines (though the history of the "classic" name is unsure.) Classic The first series of calculators (HP-35, HP-45, HP-55, HP-65, HP-70 and HP-80.) The HP-67 is also regarded as a classic even though it is based on Woodstock series technology. Many beginning collectors are confused by series names that are often used when discussing HP calculators. (8) The $842 price (ebay) and the $25 price (offline sale) for an HP-16C were reported to the museum in the same week in 2002.ĭifficulty ratings are based on the experiences of the curator and a few other collectors. (7) The red dot shows through a hole to the right of the power switch. (6) Described as Mint In Box and complete. Quantity 1 pricing usually starts at $20.) The high-priced samples were described as "new in the box". (The $3 price required the purchase of at least 25 units. (5) Around 2000, HP-75C and D prices were depressed by recent large-scale sales by several companies and government agencies. (4) If you really want to impress your collecting friends, collect one each of the HP-94D, HP-94E, and HP-94F. Some HP-41C accessory prices that have been seen on eBay: The recently discontinued HP-42S also has fans that will pay very high prices. However, their popularity persists among some users so don't be surprised if some owners refuse to sell at any price. (3) HP-41s were very popular and therefore very common. The $400 HP-10C was described by the seller as "new in the box". The good news that you can sometimes get them for throw-away prices. (2) Some low-end models like the HP-10C and HP-31E are hard to find as they tend to get thrown away. (Several less-than-excellent samples have sold recently in the $300-$800 range.) The "incomplete" entry refers to a sample missing, any of the following: pen stylus, clasp stylus. (1) The HP-01 is not really as rare as most other Extremely Difficult and even some Very Difficult models but everyone knows it's a great collectible so it's very hard to obtain. ![]()
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