A thousand dollars
Charlie is exactly right; he answered the question you asked.
What I think you meant to ask is: What is the "purchasing power" of $1,000 today, compared to 20 years back?"
Due to inflation (in costs of goods and services) the purchasing power has declined. That data is available, but I don't know it offhand. I will guess it might be worth between $600 to $800 in purchasing power, compared to 1990. Just a guesstimate.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them