How much would a rare used Hewlett-Packard 41C Calculator sell for?

How much would a rare used Hewlett-Packard 41C Calculator sell for?
I have a rare HP 41C scientific calculator that I can't find over the internet or on eBay, and I do not know how much I can sell if for. So does anyone have an idea how much I could get for it?
PDAs & Handhelds - 1 Answers
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1 :
Some have been sold on eBay for as low as $63 and as high as $178 depending on what they come with. Search on eBay for... 41C calc* ...and on the left side, select 'completed listings' to see what successful sales have happened recently. Good luck!

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