Horses for courses I guess, but I would not be comfortable buying one, I know my 1 year old 400d has 11000 actuations, and it would be easy to use it more. A D30 or similar may have had semi-pro use for weddings etc, and may have many more. It could also, have many less, but it is a risk you take. I have, however, bought a few second hand film cameras with no problems.