In 1990, I bought an AE grade Fox 16 with 28" Krupp barrels and factory straight hand stock. The but stock had been replaced. I paid $2200 at that time. Today the same gun would go for about $5000+.
The prices on these guns just keep rising. Bought a A grade 20 gauge with 30" Chromox barrels about 2 years ago for $2500 - a steal at that price. At the same time I bought a 20 gauge Sterly for small money. I sold the graded 20 for $5500. Gave the Sterly to a friend and beginning bird hunter.
If you can find a un-messed with Sterly 16 for $1500, I would buy it right away.
