If the price of ironing boards were to decrease, the following would likely increase:

Demand

A lower price of ironing boards would make them more affordable, leading to an increased demand for the products. This increased demand could come from a variety of sources, including households who may not have previously been able to afford an ironing board.

Competition

The lower cost of ironing boards could also lead to increased competition between businesses selling them. This could lead to a wider variety of options for potential buyers and could also help to lower the cost of ironing boards even further.

Supply

Finally, a decrease in the price of ironing boards would likely lead to an increase in the supply of the product. This could be due to businesses producing more of the ironing boards in order to meet the expected increased demand.

In conclusion, a decrease in the price of ironing boards would likely lead to an increased demand, increased competition, and increased supply.