You might find Ikea way too ubiquitous and boring today, but there was a time when having a prefab house was all the rage.
First off: What even is a Sears Modern Home?
Then a mail-order catalog (and eventually a department store), Sears, Roebuck and Company sold houses across America in the early 20th century via the railroad. They had about 400 different designs that cost anywhere from a few hundred dollars to a few thousand. People would buy the pieces (including appliances) and build them themselves from instructions via Sears.
Source: ffshoe
But — is your home really old? Was it built between 1908 and 1940?
This is when Sears sold kit homes. They have a list of every single house they ever sold, the year it was built, and what the design was. Pictured here is the Avondale home #151 in Oklahoma from 1911, which cost between $1,198 to $2,657.
Source: ffshoe
Here's another version of the house, also in Oklahoma.
Source: ffshoe
And here's the original catalog version.
Source: ffshoe