I thought I got lucky when I managed to get 400 strips on eBay for just over $120. They arrived today and 100 of them expire end of this month and the other 300 at the end of March. I am wondering what happens after expiry. Are they suddenly no good or are the like other use by items you buy in stores that can be used for a while after expiry? I can’t afford to throw away 400 strips. Was so upset when I saw the expiry dates. I use about 25 a week so won’t manage to use 400 in next five weeks.