Recently I submitted a batch of comics under the modern tier as they were all 1975-84 Marvels.
I have another batch of Bronze, but now have earlier comics from 1972, some post 1975 stuff, and some magazines from the mid/late 70s.
Is it recommended to combine all this into one submission, or split it up into different tiers/service categories? Wondering not only about cost efficiency, but also wait times, as I was told that vintage books take much longer to return.
Any advice or tips based on 1st hand knowledge or experience would be appreciated.