The Trabant often had wait lists of ten or more years[1][2].
The Soviet Lada often had wait times of five to ten years[3].
Even the Morgan Plus 8 had wait lists of (reportedly) a decade long as recently as 1990[4].
[1] - https://doi.org/10.1093/hwj/dbp016 [2] - https://en.wikipedia.org/wiki/Trabant [3] - https://theses.gla.ac.uk/71079/1/10390647.pdf [4] - https://www.morganville.org/history/the-waiting-list