Dietsche Postcards (Keep Raw or Slab) ?
If I wanted to sell my Dietsche Detroit postcards from 1907-09 in the future, to get the highest price should I keep them raw or have them slabbed ? If slabbed what service would be best ( SGC or PSA) for best future value ? My kids will sell these someday when I'm gone. Trying to decide what is best to do with some of these items. Thanks Mike
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