i have quite a number of marcist bits bought from tradetiler. they are real quality and certainly worth the money.
i really dont understand why anyone who is a pro and drilling holes on a regular basis would not want or need something like this.
I have bits from other quality manufacturers as well and they are much of a muchness i think. its only when you go for low end cheap charlie bits that you can really tell the difference.
the one on ebay ed is starting at that price unfortunately coz if that was to buy now price i would get now just for spares in future.
ishi69 is right about the montolit dna blades. dave at tradetiler sold me a blade for my big black porcelain 1000 x 1000 x 20mm job which i have shown on this forum recently. it was way out ahead of other quality blades i had for various saws.
i recommended this blade on forum some time ago.
we managed to cut a 3mm strip 1000mm long with is blade. it is well worth the extra money.