Re: Buying Stock photos for the web. Question?

[psychotronic]

I think any image stock photos provider (unless free images provider) will never allows that, because when you place more than 800 px image on your site, people will able to save / copy / stealing their high-res image easily.
The safest way think is using your own photograph.
But maybe you can try this : http://www.bigstockphoto.com/usage.html, i didn’t see "no 800px" image usage restriction there, unless you use the image on a gallery or library format