I normally chuck my carts away after a years + use, only buying budget ones like Denon 110, Ortofon Blue etc, but can you ever be sure when a cart is ready for the bin? I currently use the wonderful Nagaoka mp200, not only a big step up from previous carts but an incredible bargain direct from Japan, with replacement styli only a £100 Bought my first one last November, some days play around 5 hours, other days 1 hour or less, most days around 3 hours I guess, playing music whilst doing other things. So, when do you bin yours and how can you be sure your not 'throwing money away'?! Actually at a £100 a pop I may just change it yearly anyway.