お安い is read as おやすい (oyasui) and means easy.
おやすい
oyasui
やすい
cheap
やすっぽい
cheap-looking
きやすい
relaxed
やすうけあい
promising without due consideration
やすものがいのぜにうしない
you get what you pay for
ふあん
anxiety
あんしん
peace of mind
えんやす
depreciation of the yen
めやす
rough estimate
やすうり
bargain sale
たいあん
day that is lucky the whole day (in the traditional calendar)
あんじゅう
being content with one's present position