I had a similar question to wrestle with recently, but the opposite side. I had a bunch of "junk silver" I
inherited and wanted to consolidate some. So I had to decide what to keep and then try to get the best I could for the rest.
So I kept all dollars ( and would probably buy those first in your position ). Kept most halves ( only selling the "worn" 1964s, 40%s, and some well worn franklins ). Kept all
Standing Liberty quarters and Washingtons before 1940 - not a lot of either. Kept all barber and most
Mercury dimes. Sold most others.
Got 10.5X for the 40%s and 24X for the dimes, quarters, halves.
I thought that pretty fair since spot was around 25X and the second best offer I had was 22X - most offered in the 17-20 range and one guy I turned into the BBB tried to tell me that 10X was a generous offer - LOL. I asked one "we buy gold&silver" guy what he'd offer and he said 20 was his best. I told him the guy down the street just offered me 24 and he asked me where because HE wanted to take him up on that offer. LOL So I went ahead.
The premium they're willing to pay on dollars, particularly Morgans - as surf22 said it is $4 in AZ but was more here in OH, would make me think those are the best "at spot" values to buy. Thus I hung onto all of mine and most of the halves as well. Collecting
Washington quarters and dimes is not appealing to me personally tho either - for some reason.
Good Luck!