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Seems like worth trying. I didn't buy it off a shop, but have no idea as to it's history.
These should work - https://www.bluestarcoffee.eu/iberital-grinder-conic-blades-7142-p.asp? Price is the same as a bag of coffee, so i'll give them a try.
Scrabble
Stevethecoffee
It’s usually worth replacing the burrs on a used commercial grinder as soon as you get it unless you’re sure it’s been lightly used. Once you’ve done that they should last a lifetime in domestic use. Replacement burrs for that machine are not much money. Give me a shout if you have any trouble sourcing them.
Blunt burrs produce less definition of flavour, but you won’t know until you change them because it happens incrementally. Also they grind slower - if it’s taking more than about 10 seconds to grind a basket full then they’re probably dull. You’ll notice it sounds better when you change them if they’re blunt.