Complex sentence: Unlike most transistors sold in the 1950s that cost $10 or more, the 2N107's initial price was under $2.00; still a lot of money for the experimenter in the 1950s, but within reach.
Split into simpler sentences: Unlike most transistors sold in the 1950s that cost $10 or more, the 2N107's initial price was under $2.00. Still a lot of money for the experimenter in the 1950s, but within reach.