I don't personally sell the copyright to any of my images...that remains soley my ownership.

What you do get when you purchase any digital file is full reprinting permission - this should not be confused with copyright.

If I have clients who want to use images for websites/commercial use etc - then permission is given for this use in the initial release form and I am paid accordingly, even through word of mouth advertising through recognistion as the photographer - magazines and newspapers will always have the photogs name beside an image...otherwise images are for personal use only - I wouldnt mind an image of mine being entered in a competition for a 'cute kid' or something - but I definately wouldnt want someone winning a trip to the US for eg in a photo comp after using my image if I haven't been compensated for the copyright of this image