Need advice on soft bags

I am hopefully going to look at a set of soft bags this weekend and want to know what to look for. Specifically how they should mount or hang. He sent pics of them on his bike which coincidentally also has a Givi hard tail bag. He shows the straps between the two side bags on top of the seat and they just hang on the sides.

Seems to me the straps could go under the seat so the passenger doesn't sit on them. Also, and more concerning, what would keep them from swinging in to the exhaust? the mount for the Givi seems to stick out enough for just sitting, but what about when riding?

"Nelson-Rigg soft tail bag 16 liter/22 liter expanded with rain cover, measures 13"Lx11"Wx7"H/9.5"H expanded.
Two touring soft saddlebags 29 liter per side with rain covers, measures 15"Lx9"Wx13"H.
Both saddlebags have never been on motorcycle, tail bag only for a couple months."


Lastly, asking price is 130, does that sounds reasonable?

WTF is up with pics not uploading? Been that way for two day >:-(
Try this:

 

I have used 1 zip tie on each saddle bag, to make sure it stays put while riding.
Zip it to the luggage rack or something close. Bungees are too damn flexible.
Bring extra zip ties for the trip home, since you have to cut them off to take the bags inside overnight.

 

Will keep that in mind.

Think it's a fair price?

 

Nelson Riggs seems to be good quality, my limited experience.
Shop for a price, I don't know.

Make sure the bags stay clear of the muffler, don't burn your dainty underthings.
No need to ask how I know.

 

Before I got my hard bags, I made very good use out of a set of Cortech side and trunk bag. But that is about the only good thing I have to say about Cortech,. Their waterproof jacket pant suit is like shit and they are lie'n loosing basterds when you deal with warranty. https://imgur.com/a/B3YrV

 

That has been a concern since seeing the pics. He said he hasn't mounted them so can't comment (makes sense). I have the Givi mount for the tail bag, and it does protrude outward past the mufflers, kinda like a crash cage, so I'm hoping that will help.