We've searched the internet and found the largest collection of O Scale trains for sale is on eBay. Below are the listings for 'F9'.

Lionel Pennsylvania Railroad F9 Well Car 6 16983 with Cable Reels O Scale
Lionel Pennsylvania Railroad F9 Well Car 6 16983 with Cable Reels O Scale
$26.95
Time Remaining: 2h 56m
Lionel PC F9 Well Car 39064
Lionel PC F9 Well Car 39064
$52.00
Time Remaining: 1d 4h 40m
Buy It Now for only: $52.00
LIONEL O Scale 6983 PENSYLVANIA RR F9 WELL CAR 6 16983
LIONEL O Scale 6983 PENSYLVANIA RR F9 WELL CAR 6 16983
$39.99
Time Remaining: 1d 8h 38m
Buy It Now for only: $39.99
Lionel Bethlehem Steel F9 deep well flatcar with Sparrows Point propeller load
Lionel Bethlehem Steel F9 deep well flatcar with Sparrows Point propeller load
$49.00
Time Remaining: 3d 5h 42m
Lionel Chesapeake  Ohio F9 Well Car Diecasr Wheels 16946
Lionel Chesapeake Ohio F9 Well Car Diecasr Wheels 16946
$49.99
Time Remaining: 4d 21h 10m
Buy It Now for only: $49.99
Lionel  16946 3840 Chesapeake  Ohio F9 Well Car with Cable Reels
Lionel 16946 3840 Chesapeake Ohio F9 Well Car with Cable Reels
$34.00
Time Remaining: 6d 4h 14m
Buy It Now for only: $34.00
Lionel O Gauge 6 16983 NEW OLD STOCK PENNSLYVANIA F9 WELL CAR W LOAD T 1228
Lionel O Gauge 6 16983 NEW OLD STOCK PENNSLYVANIA F9 WELL CAR W LOAD T 1228
$31.95
Time Remaining: 6d 22h 10m
Lionel Chesapeak  Ohio F9 Well Car 16946
Lionel Chesapeak Ohio F9 Well Car 16946
$49.98
Time Remaining: 7d 18h 57m
Buy It Now for only: $49.98
Lionel Pennsylvania RR F9 Well Car 16983
Lionel Pennsylvania RR F9 Well Car 16983
$49.98
Time Remaining: 7d 18h 57m
Buy It Now for only: $49.98
Lionel 6 16983 Pennsylvania Railroad F9 Well Car 1997
Lionel 6 16983 Pennsylvania Railroad F9 Well Car 1997
$43.95
Time Remaining: 8d 20h 38m
Buy It Now for only: $43.95
3840 LIONEL CHESAPEAKE  OHIO F9 WELL CAR C8 LIGHTLY RUN 6 16946
3840 LIONEL CHESAPEAKE OHIO F9 WELL CAR C8 LIGHTLY RUN 6 16946
$29.00
Time Remaining: 20d 3h 42m
Buy It Now for only: $29.00
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel New 6 16983 Pennsylvania RR F9 well car
$41.00
Time Remaining: 21d 4h 6m
Buy It Now for only: $41.00
Lionel new 6 16946 Chesaapeake  Ohio F9 well car
Lionel new 6 16946 Chesaapeake Ohio F9 well car
$40.00
Time Remaining: 21d 4h 6m
Buy It Now for only: $40.00
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
$34.95
Time Remaining: 24d 10h 34m
Buy It Now for only: $34.95
Lionel 6 16983 6983 Pennsylvania RR F9 Well Car NIB Brand New C 10 O scale
Lionel 6 16983 6983 Pennsylvania RR F9 Well Car NIB Brand New C 10 O scale
$40.00
Time Remaining: 25d 6h 15m
Buy It Now for only: $40.00
LIONEL 6 16946 CHESAPEAKE  OHIO 3840 F9 WELL CAR WITH CABLE REELS BUILT 8 96
LIONEL 6 16946 CHESAPEAKE OHIO 3840 F9 WELL CAR WITH CABLE REELS BUILT 8 96
$27.95
Time Remaining: 25d 10h 46m
Buy It Now for only: $27.95
Lionel 6 16946 3840 Chesapeake  Ohio F9 Well Car Never Used
Lionel 6 16946 3840 Chesapeake Ohio F9 Well Car Never Used
$31.00
Time Remaining: 26d 10m
Buy It Now for only: $31.00
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
$39.99
Time Remaining: 28d 11m
Buy It Now for only: $39.99
Lionel Pennsylania RR f 9 well car 6 16983 built in 1997 for boysorgirls unused
Lionel Pennsylania RR f 9 well car 6 16983 built in 1997 for boysorgirls unused
$63.21
Time Remaining: 28d 7h 13m
Buy It Now for only: $63.21

Other O Scale train items recently purchased through this site:

Lionel Bethlehem Steel F9 deep well flatcar with Sparrows Point propeller load
Lionel PC F9 Well Car 39064
Lionel Pennsylvania RR F9 Well Car 16983
Lionel Pennsylvania Railroad F9 Well Car 6 16983 with Cable Reels O Scale
Lionel Chesapeak Ohio F9 Well Car 16946
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
3840 LIONEL CHESAPEAKE OHIO F9 WELL CAR C8 LIGHTLY RUN 6 16946
Lionel Chesapeake Ohio F9 Well Car Diecasr Wheels 16946
Lionel Pennsylania RR f 9 well car 6 16983 built in 1997 for boysorgirls unused
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel new 6 16946 Chesaapeake Ohio F9 well car
Lionel 6 16946 3840 Chesapeake Ohio F9 Well Car Never Used
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel O Gauge 6 16983 NEW OLD STOCK PENNSLYVANIA F9 WELL CAR W LOAD T 1228
Lionel 16946 3840 Chesapeake Ohio F9 Well Car with Cable Reels
Lionel 6 16983 6983 Pennsylvania RR F9 Well Car NIB Brand New C 10 O scale
LIONEL O Scale 6983 PENSYLVANIA RR F9 WELL CAR 6 16983
LIONEL 6 16946 CHESAPEAKE OHIO 3840 F9 WELL CAR WITH CABLE REELS BUILT 8 96
Lionel 6 16983 Pennsylvania Railroad F9 Well Car 1997