16's are great boats. I bought two new ones over the years along with a 20. I bought my first new 16 is '81. Out the door with trailer, harnesses, and a few other items was $1,700.
You got a screaming deal on that boat. Even inflation adjusted, that's only $4,100.
My father bought our first 16 (no trailer) for $1,200 in 1973. That's $6,200 in inflation adjusted dollars.
The first 16 I bought myself was an '84, bought in the fall of '83 for $3,200 ($7,350 inflation-adjusted).
My latest 16 (a 2007) was bought for $7,500 in August of 2007.
The price has gone up, but not as much as you might expect.