One whole seller from
ebay is quoting catalog value of $370 for 78 MNH plate blocks with the scott number range between 803 to 831 (many duplicates- exact scott numbers are not available).
I made an offer (low ball) offer of $75. He declined the offer.
I'm requesting experts to chime in (though I understand that the lot price may vary if it contains more valuable scott numbers such as 830, 831, 828, 823, 926 etc but any low ball guess-estimate will help me to negotiate with the dealer.