SUNDAY AUCTIONS: I saw that a few 1928 MS-65 Saints went for about $2,200 - $2,300 on GC, that's without the bp. $2,500 and $2,600 with bp (rounding up/down to nearest $100, BTW). A 1924 MS-65 went for just over $2,000 w/out, and just under $2,300 with bp.
I was a bit surprised....I thought in MS-65 condition, that 1928's and 1924's were interchangeable. 1928's go for a richer premium. I'll have to check the population numbers, but I thought 1924 vs. 1927 vs. 1928 -- minimal difference. Here it's a few hundred dollars, or another 10-15%.