They're ALL worth a look, when you're figuring out what you're looking for <grin>
If you haven't already used it, "yachtworld" is a great tool to be aware of, too. It is listings for boats all over the world, and (usually) includes good specifications on each boat (condition, equipment, upgrades, etc). I used it a *lot* to compare boats - when I knew I wanted to find an Ericson, I looked at all the Ericsons listed in the US and western Canada (in my size- and price-range), so that I could compare them. It was interesting to be able to say "hmmm, this one is listed at ____ but it has been on the market at that price for a long time, I wonder why?".... or "these two have the same asking price, but one of them has never been upgraded, while the other has new sails, new rigging and updated electronics..."
Here's a sample - this is all the Hunters, 30-32 feet long, currently listed with an asking price less than $50k. You can sort by price, you can filter by location, you can look at the specs to see which boats have which goodies, etc.
http://www.yachtworld.com/core/list...er&slim=quick&No=0&Ns=PBoat_sortByPriceDesc|1
There are, according to that search, 7 Hunter 306s currently listed, ranging from $38,000 to $49,500.
As an aside, another great resource is "sailboatdata.com" - it has the specifications (length, beam, displacement, rig dimensions, dates of manufacture, number built, model-revisions, etc) for a lot of different boats. Here, for example, is the "data" for a Hunter 306
http://sailboatdata.com/viewrecord.asp?class_id=6189
Have fun! Go see boats!
;-)