@Cheese Of course you are 100% right - and I completely share the environmental concern and responsibility. We all should, and it's one of the first things which crossed my mind when I started using these blades. They're remarkably good, and there's plenty of meat on the teeth to get them resharpened multiple times. But when it costs more to resharpen than to replace? My dilemma was solved by the route mentioned by @squall_line - I don't throw the used ones away, I take them to my local recycling centre and put them into the 'ferrous metals' bin for recycling. Who knows? A few atoms of that steel may one day find their way into a Festool product 
 
@Crazyraceguy You're also right. I have absolutely no idea why Trend products aren't better represented in NA and I really think they're missing a trick. They make a range of 500+ high-quality router cutters for every conceivable application, a multitude of other consumbles, drill bits, routers, routing jigs, lock jigs, blades for pretty much everything, and all at sensible prices. I just bought their WRT router table plus their T8EK router as a permanent underslung fixture. It's a stellar combination which I christened by machining almost 400 metres of sash beads for a huge windows job. £640. An absolute no-brainer.

I havent had a blade sharpened in quite a while. Last time I did I paid something like $25. Some places charge a buck a tooth.

  $25 for what sized blade? Sharpening an 80T Kapex blade shouldn't cost more than $17 plus shipping. Dynamic Saw charges $11 to sharpen any circular blade up to 40 teeth. Blades up to 60T are $15, 80T $17, 100T $19. Re-tipping is $3.25 per.

https://www.dynamicsaw.com/sawblades.html