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| Date | 2008-04-27 |
| Message | The Curta appears often on ebay; the final price varies quite a bit, but around $800 I'd say. Good luck! and thanks for your comment -RetroCalculators |
| Date | 2008-04-22 |
| Location |  |
| Message | That Curta is amazing. Where could a person find one of those and what would be a fair price to pay? |
| Date | 2008-04-06 |
| Message | Kate wrote: >Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other... You are right. I've not been abacus trained but I've heard that proper fingering is essential to becoming fast. Thanks for your comments - and kind regards, -rich |
| Date | 2008-04-01 |
| Message | I loved your abacus demonstration, but there's one aspect that was incorrect, a formality, really. Your finger useage was incorrect. A soroban operator uses his/her right thumb to add one (Earth) beads, and his/her right index finger for all other operations, like adding/subtracting five (Heaven) beads, and subtracting one (Earth) beads. It's supposed to be a matter of efficiency, even though so far I haven't seen any information to support that, so I guess it's more a matter of tradition. Keep it up, your site is a very nice resource! |
| Date | 2008-03-13 |
| Message | The manufacturer is somewhat important (is it 'Original Odhner'?), and the age/condition. If it has a wood base and a cover , that adds considerably (especially if the wood looks good). I'd put a range of say 40GPB for a non-working common model with no wood, to perhaps 150GPB for one that is clean and working and has nice wood. eBay is fickle and the final price could fetch more, or less (and I'm no expert in valuation). Good luck! -rich |
| Date | 2008-03-04 |
| Location |  |
| Message | I have a Black 1940's Odhner Mechanical Calculator for sale! How much should i set as a reserve price on Ebay? The calculator needs a strip down and clean, its mainly just covered in dust. Andy  andrewjohnpearson@yahoo.co.uk |
| Date | 2008-01-09 |
| Location | |
| Message | I have a mint condition early Casio FX calculator. I never knew that calculators predated this wonderful machine. I'm forever indebted to your website |
| Date | 2008-01-08 |
| Location | |
| Message | Yo yo yo. Have you got any ZX 81's mate ? |
| Date | 2008-01-08 |
| Message | I was excited to find RetroCalculators.com. But having looked around the site I'm seriously dissapointed not to find a citizen A-9 featured. I urge you to extend your interest and found RetroDigitalCalculators.com. PLease keep up the good work |
| Date | 2007-12-11 |
| Location |  |
| Message | Thanks for the site! |
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