Looking to purchase a decent minivan. Reviews? Thoughts?

So my parents are in the market for a minivan.
We’re just looking for something cheap that gets us around since it will only be me, my sister, and my parents, on the car, we put a lot of stuff on it (like also going camping), therefore reason for getting the van.

The choices we have picked out so far is:

2001 Nissan Quest Top of the line, w/leather, sunroof, etc. 145km at $5500
2002 Honda Odyssey LX, the bottom line, 160km at $5900
2002 Mazda MPV LX, middle line, 166km at $4900

And also out of nowhere, we also have one last choice is:

2000 Oldsmobile Silhouette GL, middle line, 165km at $3500

We didn’t bother to pick Dodge, or Ford, or Toyota, because of the design, the common problems, and the prices.
Like these are the common problems we avoided:
Dodge & Ford – Transmission
Toyota – High pricing
No company is perfect, so this is what we think
Nissan – Electrical
Honda – Airbags, struts, transmission
GM – Headgasket
Mazda – Rods, underpowered, transmission

One last thing, we’re planning to trade in our 1998 Nissan Pathfinder, top of the line, 255km, how much can we look to get for it?

you realize that Oldsmobile is GM, right? But even so, GM makes a good product. If you’re absolutely stuck on the choices you picked though, I would go with the Nissan. It seems like the best deal to me, and they’re good vehicles.