Here's some reliable pricing. It's unlikely that this will change.

There are 102 2008 xB's allocated to dealers nationwide at the moment. Of those, there are a few with some pricing on them with accessories. Here are the accessories that are available on that resource. Obviously it could still change, but I doubt it.

Floor/Cargo Mats - $155
4 in 1 color interior with cupholder illumination - $299
Razo Shift **** - $74
Illuminated Door Sill Enhancements - $249
Pioneer Premium Audio system - $389
DVD W/Headrest Monitors - $1599
Rear Spoiler - $423
16" Alloy Wheels - $795
Rear Bumper Protector - $69
Wheel Locks - $64
TRD Exhaust - $489
You buying your 2nd gen xB from Scott Horberg - priceless

 

oh, and your dealers should have really cool xB accessory brochures on their desks, go bug them this evening and check them out. They are (as always) pretty slick!