Relatively cheap; offering a good value compared with alternatives (i.e., lower cost or better value-for-money).
大量購入だと一つ当たりの価格が割安になる。
If you buy in bulk, the price per item becomes relatively cheap.
この宿は立地のわりに割安だ。
This inn is reasonably priced considering its location.
割安な中古車を見つけたので試乗してみよう。
I found a reasonably priced used car, so let's test-drive it.