I, currently, have 6 Rhino Prime BP's, 3 Boltor Prime BP's and 2 Nyx Neuroptics without even going out of my way to get them. Just did some missions to open some Relics this week and those are what I ended up with. Planning on opening as many relics as I can before Baro is back next week, so I'm probably going to end up with a bunch more of each of them too.
To me, thats just part of the crap that's filling up my Inven right now. One mans junk is another mans treasure.
Just be careful with the Melee mods, more specifically Maiming Strike. There's a good chance that nerfs are on the horizon with melee 3.0.