I was not able to find a circa 1815 price list for razors, but I did find one for
edged woodworking tools. The price of a craftsman's jack plane was 2s8d in 1816.
The bodies of planes then were wood. Cast iron plane bodies were much later.
A jack plane blade would have roughly the same amount of cast steel as a razor.
That implies to me the cost of a razor in 1816 would be circa 2s, which is less than
I expected, more on the order of a days wage than a week.