Not to be a Debbie Downer - but the '64 Vette is the least collectible of the '63 to '67 years... it has drum brakes... and just doesn't bring the money the classic '63 split window does - or the higher horse '65's... there was just nothing special about the '64 model year except there was a fuelie which could fetch some dough.
Non matching number motor will hurt the value even more...
#1 condition but with non matching numbers - I don't think a guy could get 50K for it... and maybe top 80K with a matching number motor and a few good options.
#2 condition --- NOM --- maybe 35 or 40K tops
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