[quote name='Cerridwyn' timestamp='1283659959' post='2442180']
It depends on so many factors there is not one answer.
Let me direct you to two articles on the wikia. The first is just [url="http://cybernations.wikia.com/wiki/Technology"]technology.[/url] It will give you many, if not all, of the variables that impact tech cost. The second is [url="http://cybernations.wikia.com/wiki/How_to_sell_technology"]How to sell tech.[/url] It gives you the least expensive way to buy 50 tech among other tidbits on selling.
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Thank you.