No Second Chances! Mac OS

Second
Hi All,
I have two macs that were given to me, one from work and one from a friend. One is a 20 inch imac (2 ghz,1G,250GB) the other a mac book pro(mid 2009). I have no OS on either of them . I have tried the internet recovery sequence Command, Opt R for both but can't seem to get that to work. I can get in to the recovery mode but whenever I try the reinstall option I get the error 'This item is temporarily unavailable'.
I assume the real error is 'you have not purchased the OS so your computers are useless to you'.
Is there anything I can do to get an OS installed on these machines or is it off to the dump?
Thanks
Mac

I have just got a second hand iMac (Core 2 Duo 2.4 20' Mid 2007) Which has been fully wiped. I have connected it to wifi and am trying to install OS X by using the reinstall option but when I log in to the App Store it just says item temporarily unavailable.

No Second Chances Mac Os X

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