Is this ferret cage big enough?

look at the cages from ebay below. do u think these sized cages are a good size for 2 ferrets? im thinking they are i just wanted some opinions. theyre only around 50-60 dollars which is a great deal so.... PS-if the time on the cage ended and u can still look at it, id still appreciate responses for... show more look at the cages from ebay below. do u think these sized cages are a good size for 2 ferrets? im thinking they are i just wanted some opinions. theyre only around 50-60 dollars which is a great deal so.... PS-if the time on the cage ended and u can still look at it, id still appreciate responses for future reference.

http://cgi.ebay.com/Small-Animal-Cage-Su...

http://cgi.ebay.com/30-bird-Animal-Cage-...
Update: this is just a random idea, but do u think it would be possible to turn a dog crate into a ferret cage?
Update 2: from the above sites. are those cages, if big enuf, the bare min? or are they have a well-sized volume that would be quite comfortable for 2...?
Update 3: for the dog crate idea-i would use one for a larger breed-im not talking about one for a small terrier. i was thinking about this idea bc i would be able to get a considerably larger cage for some ferrets for about the same price as the ones form ebay above.
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