I've been grateful for the Material Traders implementation, warts and all, on at least a few occasions: rolling G5 mods where you have eight of something, thinking you have enough, and you watch the final G5 rolls increment by .005% while the mat count dissipates to red text.
I've finished rolling with what I have, selected the experimental, and then headed to the needed trader for the proverbial bath to trade up something else to complete the mod. I then picture the bug dude from Star Wars (one with pachyderm nose, wings, and a cigar) laughing as I exit the station. Is being trader-ganked a possible concept?