• The instrument is moderately ( or reasonably ) priced ( or inexpensive , or not expensive ).
• The machine is of moderate cost .
• The instrument is moderately ( or reasonably ) priced ( or inexpensive , or not expensive ).
• The machine is of moderate cost .
Циммерман М., Веденеева К.. Русско-Английский научно-технический словарь переводчика. Russian-English scientific dictionary for translators. 2012