I paid $210 for 3 pails (5 gal) of the Mobilfluid 424 in Harrison last summer at a small oil company in town.
The hydraulic filter is ugly for the ct4xx series. $90 to $130 depending on where you get them. The hydrostatic is better but still bad, like $25-30 or so. For the ct2xx series it's seems to be the other way around the hydrostatic is the uglier one, but not as bad as the 400 series. It'll be $200 or so for the fluid. 3 5 gal pails. The rest of the stuff for the 50 hour service is pretty reasonable.
The 200 models/CKs don't take quite as much hydraulic fluid as the 3&400s/DKs (8 gl. vs 11 gl). When I did my 50 hr last summer, I bought 3 2.5gl jugs form Bobcat and it was enough to do the change since a couple quarts stay in the steering and loader circuit, but that didn't leave me any extra for adding later on when I had a rear couple start seeping.