I've noticed that in the dpreview website, many photographers change their brand new equipment with the shops, returning them because of many issues such as dead pixels, ?white banding on a 30D etc..

so my question is when you do want to buy a second hand DSLR what would be your choice? some talk about a canon refurbished DSLR as the best way to go because canon has the highest standards in ensuring that a second hand DSLR is of "as new" working quality.(and is that expensive to send it in for a refurbishing?)

thanks for all the comments...