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 16983 Pennsylvania RR F9 well car
Lionel New 6 16983 Pennsylvania RR F9 well car
$38.00
Time Remaining: 2d 12h 3m
ATLAS F 9 DIESEL LOCOMOTIVEO Scale No6101
ATLAS F 9 DIESEL LOCOMOTIVEO Scale No6101
$85.68
Time Remaining: 2d 12h 26m
Lionel 16946 New C  O F9 Well Car 3840
Lionel 16946 New C O F9 Well Car 3840
$40.00
Time Remaining: 2d 20h 23m
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: 4d 17h 21m
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
$180.00
Time Remaining: 6d 6h 5m
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
$180.00
Time Remaining: 6d 6h 7m
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
$180.00
Time Remaining: 6d 6h 8m
Atlas 2 Rail F3 F7 F9 O G Scale Lionel LED wiring harness with CCA
Atlas 2 Rail F3 F7 F9 O G Scale Lionel LED wiring harness with CCA
$59.99
Time Remaining: 7d 14h 20m
Buy It Now for only: $59.99
Lionel Cheapeake  Ohio F9 Well Car 6 16946
Lionel Cheapeake Ohio F9 Well Car 6 16946
$25.00
Time Remaining: 8d 15h 45m
Buy It Now for only: $38.99
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
$34.95
Time Remaining: 8d 17h 36m
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel New 6 16983 Pennsylvania RR F9 well car
$41.00
Time Remaining: 22d 5h 48m
Buy It Now for only: $41.00
Vintage PEMCO PRR Engine HO f 9 Diesel
Vintage PEMCO PRR Engine HO f 9 Diesel
$50.00
Time Remaining: 23d 13h 36m
Buy It Now for only: $50.00
LIONEL Pensylvania RR F9 Well Car 6 16983 w Cable Reels Made in USA BRAND NEW
LIONEL Pensylvania RR F9 Well Car 6 16983 w Cable Reels Made in USA BRAND NEW
$34.99
Time Remaining: 24d 13h 45m
Buy It Now for only: $34.99
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: 26d 14h 15m
Buy It Now for only: $94.00
Lionel new 6 16946 Chesaapeake  Ohio F9 well car
Lionel new 6 16946 Chesaapeake Ohio F9 well car
$40.00
Time Remaining: 28d 9h 36m
Buy It Now for only: $40.00
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: 29d 10h 8m
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
$38.25
Time Remaining: 29d 10h 48m
Buy It Now for only: $38.25

Other O Scale train items recently purchased through this site:

ATLAS F 9 DIESEL LOCOMOTIVEO Scale No6101
Vintage PEMCO PRR Engine HO f 9 Diesel
O Gauge Lionel 6 16983 Pensylvania RR F 9 Well car 6983 1997
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel O Gauge 3840 Chesapeake and Ohio F9 Well Car 6 16946 in Original Box
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 3
Atlas 2 Rail F3 F7 F9 O G Scale Lionel LED wiring harness with CCA
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 2
LIONEL Pensylvania RR F9 Well Car 6 16983 w Cable Reels Made in USA BRAND NEW
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
Lionel New 6 16983 Pennsylvania RR F9 well car
Lionel 16946 New C O F9 Well Car 3840
LIONEL 16318 LL FLATCAR 16929 BC GONDOLA 16946 CO F9 WELL CAR ALL W REELS
Lionel Cheapeake Ohio F9 Well Car 6 16946
Lionel new 6 16946 Chesaapeake Ohio F9 well car
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