How much is an average amplifier?

Excuse me, I'm trying to gather some information on amplifiers. I'm not very familiar with the market prices, so I was wondering if you could shed some light on this for me. Specifically, I'm curious about how much an average amplifier would cost. I understand that prices can vary greatly depending on the make, model, and quality, but I'm just looking for a general idea of what a person might expect to pay for a standard amplifier. Could you please provide me with an estimated price range? Thank you very much for your help.