Replace Dyneaudio Tweeters or Sell As Is? Newbie Seeks Advice?

Just retired, clearing stored gear. Have mint pristine solid maple Dyneaudio (Contour 1.8 Mk II) towers and both ESO-Tec tweeters are kaput. Would you put out $500 to replace the tweeters and hopefully sell at Bluebook (if possible) at ~$1,600. Or, would your best guess / recommendation or just try to find someone who would pay less for them as is? Any advice ideas appreciated!