What size/weight do you want? Used fleece is plentiful and cheap. I like simple 200w Polarfleece for best loft/weight. The windproof fleece products are heavy, sweaty, and don't provide the insulation– might as well have a soft shell. From there you pay for features– pit zips, fabric panels, name brand, etc, etc.
Don't forget vests. I have a Sierra Designs 200w vest that is great under a shell.
For an all-round work/commute jacket, the shelled fleece jackets are a bargain. Columbia, LL Bean, Lands End, and Patagonia have cranked them out for years.
For 300W fleece, the US armed forces ECWS fleece jackets are good. They have fabric reinforcements and are much like the North Face Denali without the outrageous price. You can get new ones for $35-$60.
Watch out when buying used fleece on line. I've gotten a couple dryer-baked wads of polyester along the way.
Another option that might blend into your UL hiking is to get a thin synthetic fill jacket like the MontBell Thermawrap, Patagonia MicroPuff etc.