What do you reckon these would be worth to a Collector

Thinking about parting with these

1967 New Zealand Grand Prix Programme
1967 Halswell Hundred grand national moto cross Programme
1956 Halwell Hundred road race (this has all the race placings & times recorded in it)

Attached Images

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• IMG_0091.JPG (359.3 KB)

What do you reckon these would be worth to a Collector