Well, at first glance I would say they cost about $20-40 dollars more depending on how who you normally order from. Otherwise they work the same as the $10-20 dollar ones I bought, or the $7.50 plastic ones I bought.
...Then again I bought a set of metal ones at about $15 despite there being a 7 sets of 7 at $12 which is less than 2 dollars a set... so I can't say anything about it being dramatically over priced and waste of money than no reasonable person would by... that ship sailed when they add metal and I bought a set for my GM to say I can't use them on his table... and then I bought a second set knowing I can never use them on roll20.