Nikon D2Xs. The camera dates from c. 2005 or 2006; I bought it secondhand in 2011. Over 13 years I've enjoyed using it despite newer more capable instruments having been acquired at intervals, and disposed of later (although I missed the D700 and bought another one when they became cheap enough). I can't speak too highly of the D2Xs. It doesn't perform very well at high ISOs but that particular shortcoming was shared with film-era cameras, and we managed OK then. In everyday use it is really easy to operate.