National candy or cig machines 60's- 80's

[maddcritter]

hey yall needing some info  on National candy or cig machines 60's- 80's with the pull khobs .what should I look to pay for a good working one are they hard to repair? im in east texas and there hard to find  here .at 1 time when I was a kid they were in every gas station and motel everywhere  any info would be appreciated thankz