Kayak Rack question

[rye]

My mother lives in raleigh and is a yaker. She got a new(to her) Rav4 this winter and is having trouble figuring out the rack situation. Money is an object so she's trying to go used. However she's not understanding the jargin associated with buying a new rack.

Can anyone help her/me/us out? She has cross bar racks that she had on her mini van but is having trouble figuring out what mounts she needs to convert to RAV to be able use them.

She tried a rack shop in Raleigh somewhere but they were pushing a 500$ system and were intentionally keeping her in the dark as to alternatives.