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 new 6 16946 Chesaapeake  Ohio F9 well car
Lionel new 6 16946 Chesaapeake Ohio F9 well car
$40.00
Time Remaining: 9h 7m
Buy It Now for only: $40.00
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel New 6 16983 Pennsylvania RR F9 well car
$38.00
Time Remaining: 11h 58m
LIONEL 6 16946 Chesapeake  Ohio F9 Well Car NIB 14 in FREE Ship Lower 48 States
LIONEL 6 16946 Chesapeake Ohio F9 Well Car NIB 14 in FREE Ship Lower 48 States
$39.99
Time Remaining: 13h 4m
Buy It Now for only: $39.99
LIONEL TRAINS 6 16983 PENNSYLVANIA RAIL ROAD F 9 WELL CAR WITH CABLE REELS
LIONEL TRAINS 6 16983 PENNSYLVANIA RAIL ROAD F 9 WELL CAR WITH CABLE REELS
$45.00
Time Remaining: 1d 10h 19m
Buy It Now for only: $45.00
Lionel O Gauge 3840 Chesapeake and Ohio F9 Well Car 6 16946 in Original Box
Lionel O Gauge 3840 Chesapeake and Ohio F9 Well Car 6 16946 in Original Box
$39.99
Time Remaining: 2d 2h 24m
Buy It Now for only: $39.99
Lionel Trains Penn Central F9 Well Car 6 36094 Six Wheel Die cast Trucks O Gauge
Lionel Trains Penn Central F9 Well Car 6 36094 Six Wheel Die cast Trucks O Gauge
$54.95
Time Remaining: 3d 14h 21m
Buy It Now for only: $54.95
Lionel 16946 New C  O F9 Well Car 3840
Lionel 16946 New C O F9 Well Car 3840
$29.95
Time Remaining: 6d 9h 38m
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
$39.99
Time Remaining: 6d 10h 33m
Buy It Now for only: $39.99
O Gauge Lionel 6 16983 Pensylvania RR F 9 Well car 6983 1997
O Gauge Lionel 6 16983 Pensylvania RR F 9 Well car 6983 1997
$37.95
Time Remaining: 8d 2h 26m
Buy It Now for only: $37.95
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 3
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 3
$150.00
Time Remaining: 11d 9h 9m
Buy It Now for only: $150.00
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
$150.00
Time Remaining: 11d 9h 9m
Buy It Now for only: $150.00
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 2
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 2
$150.00
Time Remaining: 11d 9h 9m
Buy It Now for only: $150.00
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
$35.00
Time Remaining: 12d 7h 54m
Buy It Now for only: $35.00
Lionel 6 16983 Pennsylvania Railroad F9 Well Flat Car w cable reel load rd 6983
Lionel 6 16983 Pennsylvania Railroad F9 Well Flat Car w cable reel load rd 6983
$49.95
Time Remaining: 13d 14h 24m
Buy It Now for only: $49.95
LIONEL 16318 LL FLATCAR 16929 BC GONDOLA  16946 CO F9 WELL CAR ALL W REELS
LIONEL 16318 LL FLATCAR 16929 BC GONDOLA 16946 CO F9 WELL CAR ALL W REELS
$94.00
Time Remaining: 15d 13h 52m
Buy It Now for only: $94.00
Lionel Cheapeake  Ohio F9 Well Car 6 16946
Lionel Cheapeake Ohio F9 Well Car 6 16946
$29.99
Time Remaining: 15d 17h 57m
Buy It Now for only: $29.99
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
$44.95
Time Remaining: 23d 7h 22m
Buy It Now for only: $44.95
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel New 6 16983 Pennsylvania RR F9 well car
$41.00
Time Remaining: 24d 5h 19m
Buy It Now for only: $41.00
Lionel 6983 Pennsylvania Rail Road F9 Well Car W Cable Reels 6 16983 1997 C 9
Lionel 6983 Pennsylvania Rail Road F9 Well Car W Cable Reels 6 16983 1997 C 9
$49.00
Time Remaining: 24d 7h 44m
Buy It Now for only: $49.00
Atlas O Gauge Burlington Northern F 9 Diesel A Unit
Atlas O Gauge Burlington Northern F 9 Diesel A Unit
$79.95
Time Remaining: 24d 8h 20m
Buy It Now for only: $79.95
Vintage PEMCO PRR Engine HO f 9 Diesel
Vintage PEMCO PRR Engine HO f 9 Diesel
$50.00
Time Remaining: 25d 13h 7m
Buy It Now for only: $50.00

Other O Scale train items recently purchased through this site:

Lionel New 6 16983 Pennsylvania RR F9 well car
Atlas O Gauge Burlington Northern F 9 Diesel A Unit
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 3
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 2
Lionel Cheapeake Ohio F9 Well Car 6 16946
Lionel new 6 16946 Chesaapeake Ohio F9 well car
LIONEL 6 16946 Chesapeake Ohio F9 Well Car NIB 14 in FREE Ship Lower 48 States
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
Lionel O Gauge 3840 Chesapeake and Ohio F9 Well Car 6 16946 in Original Box
Lionel 16946 New C O F9 Well Car 3840
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel Trains Penn Central F9 Well Car 6 36094 Six Wheel Die cast Trucks O Gauge
Lionel New 6 16983 Pennsylvania RR F9 well car
O Gauge Lionel 6 16983 Pensylvania RR F 9 Well car 6983 1997
Lionel 6 16983 Pennsylvania Railroad F9 Well Flat Car w cable reel load rd 6983
Lionel 6983 Pennsylvania Rail Road F9 Well Car W Cable Reels 6 16983 1997 C 9
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
LIONEL TRAINS 6 16983 PENNSYLVANIA RAIL ROAD F 9 WELL CAR WITH CABLE REELS
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
LIONEL 16318 LL FLATCAR 16929 BC GONDOLA 16946 CO F9 WELL CAR ALL W REELS
Vintage PEMCO PRR Engine HO f 9 Diesel