Luxury Tax Didn't Help
But demand for ironers began dropping as American lifestyles began to change.
Tumble dryers became more common in Amercian homes which reduced much of the need for ironing linens,shirts, etc.. This was coupled with changes in textiles and fashions such as the introduction of man made fibers (polyester)and blends that when coupled with use of special settings on washing machines (Permanent Press, Delicate, etc...) and same on tumble dryer again reduced the need for ironing.
More and more married women began working outside the home and didn't have time for ironing even aided by a machine. Also standards began to change. Cloth table linen (napkins, placemats, table cloths) if used at all were either paper or "wash and wear" fabrics that didn't require ironing.
As for the value of an ironer even an Easy, sorry to say they often don't fetch much. There are hundreds on various eBay, CL and other listings for ages without so much as a nibble. Units that do tend to sell are in or near mint condition and sought after by someone local such as a B&B, seamstress or perhaps a small laundry. Anyone wishing an ironer but not wanting to pay several thousand for a new Miele version.
Poor condition ironers sadly probably have more value as scrap metal than someone wanting to spend good money. I got my vintage Frigidare ironer for free (only had to pay shipping costs from upstate), mainly because the seller didn't want it to go to many of the scores of scrappers wanting to take the unit off his hands.
The only rotary ironers with remotely any NIB spares out there are those from Ironrite.
As for original cost,ironers were always pricey items for their day. One version cost nearly $100 around 1920's or so which was a huge sum back then. That was equal to or more than some earned for an entire month and would be over 2K today.
Other members have mentioned here in the group that towards the 1940's and 1950's appliance dealers often bundled ironer sales with washing machines. Housewives really wanted automatic washing machines but weren't always keen on the mangles, but that was a way to move units.