Who knows hulls

[b.hernackiAgte.]

I'm looking for som old salt who has alot of knowledge of hull configurations & sizes for older small power boats. I am about to sell my old 18' bayliner capri. A good frient owns an '85 21.5 Capri which - from what I can find- is the biggest bowrider with the highest capacity around. It seems that newer bayliners or other brand like searay - sell great boats of that length but have nowhere near the capacity.
I can't seem to locate an expert who know just what years thet hull size & configuration was made - although I think its from '85 to'89.
Are there any other makes or models out there that compare.
We don't boat much.
We are on a budget
we need to have lots of room to carry people when we do go out.

Can you shed any light on this or can you steer me to an expert ?