Hot Wheels Redlines

I HAVE BEEN BUYING FROM THE CENTRAL VALLEY FOR OVER 20 YEARS! I am a local collector always looking to add to my personal collection.
I am looking to buy old toy diecast cars made by Mattel from 1968-1977.
They must have a red stripe on the tires and be made in either USA or Hong Kong--- this is how you tell old from new remakes.
I have always paid top dollar for them, so before you try other avenues of online sales ( time, fees, and misery ) -I have cash waiting.
I sometimes buy cars in poor condition for their parts.
The type of cars I am looking for are pictured above.
I also am buying track sets, cases, blister packs.
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ANYTHING from the redline era.
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(1968-1977).
BEWARE OF WANT-ADS FROM OTHER AREAS/STATES.
I AM LOCAL