I was wondering how ppl would feel about the the Guilds selling Dark Matter for Guild Marks?

Under the current system <patch 1.18> ppl are earning Guild Marks hand over fist with nothing to spend them on. I have bought everything for Blacksmith and still have 30K in Marks and it is building

Dark Matter was designed to repair equipment that is, in the most part, crafted.

Seems logical to me that Dark Matter should be sold at the Guilds for about the same rate it is now being sold in the Companies.

Opinions?