Just what the title says.
Best online site?
My sister is a VP for a small local bank and they are looking to move several repossessed aircraft.

www.barnstormers.com

http://www.aircraftauctions.com

Barnstormers
trade-a-plane

I have bought two planes from Barnstomers…..

It really depends on the type of plane.
If it is a cub… A J3 cub forum would move the plane if it is a good deal.
Biplaneforum.com if is a bipe…. etc.

Buy a ad in speednews

Or go through a broker

PM me the tail numbers and I will see what I can pull

What kind of aircraft. It matters.

Barnstormers for ultralight up to light twins.
Trade-a-plane for J-3 up to small biz jets.
Controller for Cessna 182 up to retired airliners.

There is, as you can see, some overlap.

That said, unless someone there at the bank really knows the aviation world they probably should go though a broker.

And, if your sister doesn't already know the above, they probably don't know much about aviation.

What are they?  Spill the beans?  You can sell them here.

All I know is they're twin turboprop, 10-12 seat.
Three of them

Update:

Just spoke with her.
Apparently there are 12 aircraft.
One of the bank owners was/is a pilot with his own airstrip and 3 planes.
He OK'd a lot of questionable loans for people he knew in aviation.

I'm trying to get a list.

Sounds like a couple of King airs. That's a lot of planes to let sit.

If these are the planes I think they are (old strait Beech 100's) they could be my old planes. By that I mean I did the prepurchase inspections when we got them and I used to take care of them over 15 years ago before I left the company, it was actually doing very well in the late '90s.
If so they have already been sitting a long time. So much time that all airframe, engine and prop time checks and overhauls that have calender limit are timed out.
I only say that because I saw 3 of my old planes on ebay a few weeks ago and it only said they were out of annual.  These things are a little different than an inspection cycle on a 172. The continuous airworthiness or time limitation section of the King Air maintenance manual is FAA regulated and required even if part 91 only.  Can't just do an annual inspection and be gtg.
If these are what I think they are I may have my boss contact him again about getting one of them up to date and operational, no one knows those 4 planes better than I do.

I sold my Cessna 150 on eBay........twice. The first guy backed out right after he hit "Buy it now" without even looking at it. I removed that option for the second auction and it sold.

With that many, and being bank owned, I would recommend a broker.

This, value will depend on what logs and paperwork comes with them.
Turbine gets $$$ for inspections and paperwork. They all airworthy?
May need ferry permits to move.

op, did you get the list? I am curious to know what kind of aircraft.