Keep in mind prices shown are list, not MSRP
This was a wholesale catalog to the trade, dealers would have marked-up things before selling them on.
For those old enough to remember "I can get if for you wholesale", was frequently heard around households or whatever. It meant someone knew a guy, that knew a guy who knew a guy that could get you something at the insider (wholesale) price.
There used to be whole catalogs/directories listing places that sold wholesale, but also would do retail on side (legally or not).
Legally wholesale places also only sell to those with tax ID numbers because they don't tack on sales taxes. This is legal because things aren't for personal/retail use, and laws assume what is bought will have taxes tacked on when resold at retail. This and or items are for business/corporate use.
If you were a landlord or developer and needed appliances you could go to Lindons and stock up.
A housewife or anyone else would be lucky back in 1958 to get new laundry appliances at anything close to those list prices.