bike rental

[OliFu76]

does anone know whether there is a bike rental in the helsinki region that rents out bikes for longer periods of time(1 or 2 months)? I´m here for only three months so thats too short to buy an expensive mtb and too long to rent one.
Or, if anyone doens´t need his bike and wants to earn a few bucks instead of letting it catch rust....
another possibility: if anyone of you had a (working!) cheap bike to sell, I´d possibly also have a look at it...

thanks!