Replying to How to tell if you're bindings need replacement?

I'm going into my 3rd year with the same ski binding combo. Its much easier to tell how my skis are shaping up by the amount of dings and scratches on them than my bindings. Im planning on getting new skis this year but what im wondering is if i should replace my bindings as well? How can i tell if my bindings are ready to go? They look to be in good condition and i've had no problem with them so far. They are Marker free 10.0 bindings if that has any relevancy. Gracias