No they are insanly cheap now days
Got no idea about US historical wage rates but I would guess that $ 89.00 in 1953 would have been some where from 1 to 2 months salary.
Down here it was 8 weeks of average male adult wages including overtime & shift allowences.
In 1970 I was making $ 75.00/ week & the national average was $ 90 so it was down to a weeks wage, ie 1/8th the price.
In 2014 the nation average was $ 1250 /week so the $ 200 bg biox cheapies are less than a days wages or 1/40 th of the 1954 price.
When looking at historical pricing you should always relate it to wages at the time and it is helpful to convert everything into hours of labour to acquire the mower.
The top end Honda self propelled sells around $ 2500 down here, about a week & a half.
The average mower is around $ 500 or 2 days wages.