Graingers (http://www.grainger.com/Grainger/wwg/productIndex.shtml) 
(search for "see snake") has it for $229.

Nate Duehr wrote:
> Arkady wrote:
>
>   
>> There are no prices there, but I can guess these are far more expensive my
>> friend is willing to invest.
>> Besides, while camera can help to understand the origin of the problem, it
>> will hardly help to determine the exact position in the wall.
>>     
>
> It's also just something else to get stuck in the wall.  :-)
>
> Nate
>   
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