If you've got a reese hitch like this sticking out the back of your car somewhere..
...I can sort you out a THULE bike rack to suit. You don't need a towball to use some of their models - but you do need the above slot (a Hayman Reese) on whatever car you plan to get a bike rack fitted to. I can do a number of other brands - namely Rhinoracks - but THULE are excellent from a warranty & quality point of view.
Just hit me up with a pm and I'll help you out! :-) Will be able to do things alot cheaper than RRP.