That helps a bit but please understand that Cruiser's Forum is very international. I don't know the exact statistics but am guessing about half the members are outside the US, many in Australia
but also lots of members from other countries in Europe
, South America
, South Africa
and just about any other country you can name (haven't heard of any from Saudi Arabia but there might be one).
Unless you tell us, we have no idea where you located and the answer on where to find a used dinghy would be very different depending on whether you are in Sidney or London or Capetown. You would probably also get some different suggestions depending on whether you are in Los Angeles or Seattle
If you can give us a location then since the forum has thousands of members from every part of the world you will probably get some very good suggestions from someone in your local area.
If you happen to be in the USA and on the east coast
have you tried Craig's List? I found a very good deal on my last dinghy that way.
In general you are going to get the best performance from a RIB
but due to size, weight and storage
restrictions some boats can't carry a RIB
. It gets down to whether your boat is large enough for davits
or has space on the foredeck to carry a RIB or if you have to have a soft bottom dinghy that can roll up and fit below.