Most tedders are light weight and flimsy contraptions. Something not mentioned is their tendency to need frequent resetting. I've owened two, and they can fall out of adjustment. So stop and check every hour or so.
My current tedder is a cheap italian brand, but it is so much better than the one I had before. That first one shed a lot of arms at a price per each I have mercifully forgotten. Teeth were overpriced too.
I'm starting year 3 with the italian. I'll probably look to trade for another, if cattle prices don't tank.