How much would it cost to install vertical doors on a 2005 Scion xb?

Well, that's quite the vague question. If you have a "Universal" kit, than the shop you take it to will have to align and drill holes, possibly roll your fenders as well as the possibility of having to weld the hinge onto your vehicle. At the labour costs of $65/hour+, you're looking at upwards of $600 (at the least) for a good job! Whereas a "bolt on" kit (from a reputable company), will take much less time because there is no welding or aligning to make sure they drill the holes perfectly for your vehicle! They should only have to roll the fenders and make sure the hinge is perfectly flat against your vehicle (same with the Universal kit). This should only take Max 4 hours to do... so anywhere around the $250 mark... or so. All just estimates and personal experience.... DON'T go with universal.. IMO Good luck!!