Seleukids and a broken tetradrachm

What is your opinion on broken coins, are they still as collectible or are avoided due to the diminished value?

I own a few broken coins, mostly silver ones that broke due to crystallization over time. The Crystalization occurs due to the leaching of the impurities (lead, copper) out of the coin into the soul, leaving the coin porous and brittle.

Here is my latest addition, also my first attic weight tetradrachm (almost).



SELEUKID Syria
Demetrios I Soter, 162-150 BC. Tetradrachm (silver, 14.83 g, 31 mm)
Antioch.
Diademed head right within wreath.
Rev. BAΣIΛEΩΣ ΔHMHTPIOY Tyche seated left on backless throne with winged tritoness support, holding sceptre and cornucopia;

And a complete drachm of the same king



Demetrios I Soter, 162-150 BC.
Drachm (silver, 4.11 g, 18 mm),
Antioch on the Orontes.
Diademed head of Demetrios I to right. Rev. ΒΑΣΙΛΕΩΣ ΔΗΜΗTΡΙΟΥ ΣΩTHPOΣ Cornucopia to right.

I do wonder where the other piece of the broken coin is, as it seems to have broken not too long ago. Would have been a simple repair job.