...I have just found a catalogue entry for this engine from 1899 (Christmas edition...).
The price given is "18Mk", and "20Mk" for the version with water pump.
On the internet I found that for 1899, a realistic exchange rate would be 17,82€ for 1Mk (Goldmark), so the price would be 320,76€. Cheap in comparison to actual WILESCO or MAMOD prices...
Or in their own words "Vorstehende Maschine ist bez(üglich) der Ausführung und des Preises ohne Konkurrenz" (the aforementioned engine is without competition regarding its quality and price)!
(Attachment Link)
Thank you Thomas for the Lipsia Sheet - very informativ and I would like to buy some for 20 Reichsmark!
But 120 years ago work was paid at 0.20 cents an hour - so you had to work 100 hours net
to have the money for the engine - that was not affordable for every family. Today we can be happy that life is a little easier.
Greetings from the upper lake, Arnold