Nothing bullshite about it... The Zumo 550 can be had for $680, and mounted for that price, it comes with all you need.
Clicky
Now you might want to add XM, and it's true it doesn't come with the XM antenae. But that can be had for $180 if you shop around, you don't have to pay $300 for that and you're dumb if you do.
No matter what GPS you buy you're going to need a mount, and you may not like the mount it comes with.
The 27xx/28xx series might be a better value since it comes with the XM reciever. But the Zumo is smaller and I like that.
No matter what GPS you buy if you're going to tie it into a comm system there will be cables involved.
Yes, you can easily sink a grand into a Zumo install, but you don't have too.