I agree with everything Jansen said. For me, the biggest pro is the easy trailerability and and ease of set up. The nearest lake is almost 2 hours away from here. If I was keeping it at a dock or mooring, I might choose differently, but in my price range there is no other boat this size that can do all that the 26C's do.
On the con side, the water ballast makes them more tender than a comparable keel ballasted boat. They heel quickly but stiffen up as the water ballast tank starts to rise out of the water on the windward side. I haven't heard any stories about anyone on this forum ever tipping one over. Right off the production line, there are few frills provided with these boats, but most owners add lots of upgrades. Chances are that the previous owner has added lots of goodies for you.
I think it has been a great boat to learn on, and I have learned lots from the boat and this forum. If you buy it, you will find a wealth of friendly info here. Good Luck!