As a collector of these items; I put my evaluation of this collection anywhere from at least 1b-2b. And for the legs, anywhere from 400m+.
My reasoning is as follows: This is by far, the most complete collection of full titled OEQ items that I have ever seen, and perhaps the last of its kind. Likewise, there are several pieces in here like the maces, the heating stand, scales, etc. that may possibly be unique at this point. When factoring this together, this pretty much makes the collection as a whole unique (regardless that it contains some of the common-ish pieces). As such, the collection should receive the standard "unique" price of over 1b+, imho. Same goes for the faction legs.
I would easily pay that myself if I had the gold, and any trade of this sort should leave both parties extremely happy. Best of luck to you Assia, and whomever might get this awesome collection. My only hope is that it remains public to continue inspiring collectors of all types.