I was lucky enough to come across this rather uncommon 1970 Guild F-20 on Craigslist. It had some cracks in the back, but I've had it all fixed up and now it's a constant companion in the office!
A very good option to try to hunt down is an Ibanez Artstar AF-120. The construction on these is comparable to jazz guitars costing twice as much. Usually they can be had for $450 or less.