I think it quite easy to sharpen secateurs. If you have a pair you are loathe to part with I think you should see if anyone locally can do this. Because I constantly lose, mis- use and abuse mine I seem to purchase new secateurs almost every year but I used to sharpen them annually. Many secateurs are now sold with a spare set of blades. I'm afraid I use secateurs to cut too-thick branches as well as wire, such is my foolishness in this regard.