c 1962 20TA Scottish £750
1960 24MDS (no engine) £450
1960 24SCS £1750
1961 24SCS £1300
1962 25DC £1850
1966 Anglian £1450
1960 Scottish (no engine) £600
all hammer prices.
Most of these were from the Richard Greensides collection. No evidence of rising prices there. In fact the rest of the bikes with a few exceptions did not make big money either. Read them for yourself