Rollercoasters are hard to come by these days, aren't they, Reg? I
haven't seen one in 25 years or so now. :-(
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Paul, From the above it is clear that you don't visit junk sales and flea
markets all that often ,if ever.

Roller coasters can be found ,be it at gradually increasing prices.
An amateur radio flea market 'pilgrimage' to continental Europe would
,no doubt, provide a good harvest.

In the UK , Birkett -Lincoln has them from time to time.

Frank GM0CSZ / KN6WH