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 F3  ORIGINAL PORTHOLES  9 RARE EYELIDS    F9
LIONEL F3 ORIGINAL PORTHOLES 9 RARE EYELIDS F9
$70.00
Time Remaining: 8h 34m
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
$80.00
Time Remaining: 1d 1h 50m
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
$80.00
Time Remaining: 1d 2h 47m
LIONEL PENNSYLVANIA RR F9 WELL CAR  6 16903 WITH CABLE REELS MADE IN USA
LIONEL PENNSYLVANIA RR F9 WELL CAR 6 16903 WITH CABLE REELS MADE IN USA
$29.99
Time Remaining: 1d 6h 53m
Buy It Now for only: $39.99
Lionel CO Chesapeake  Ohio F9 Well Car 6 16946
Lionel CO Chesapeake Ohio F9 Well Car 6 16946
$45.99
Time Remaining: 1d 8h 12m
Buy It Now for only: $45.99
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
$59.00
Time Remaining: 5d 6h 38m
PD F3002 F9 B kit
PD F3002 F9 B kit
$29.50 (3 Bids)
Time Remaining: 5d 10h 37m
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
$39.99
Time Remaining: 6d 22h 55m
Buy It Now for only: $39.99
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: 12d 10h 10m
Buy It Now for only: $94.00
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: 13d 51m
Buy It Now for only: $35.00
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: 14d 2h 7m
Buy It Now for only: $44.95
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
$34.99
Time Remaining: 21d 7h 49m
Buy It Now for only: $34.99
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: 22d 5h 4m
Buy It Now for only: $45.00
Lionel Penn Central F9 Well Car 768122
Lionel Penn Central F9 Well Car 768122
$40.00
Time Remaining: 22d 11h 7m
Buy It Now for only: $40.00
VINTAGE ATLAS O SCALE 2 RAIL F 9 DEISEL CHASSIS GOOD + CONDITION RUNS F R
VINTAGE ATLAS O SCALE 2 RAIL F 9 DEISEL CHASSIS GOOD + CONDITION RUNS F R
$44.99
Time Remaining: 24d 6h 17m
Buy It Now for only: $44.99
LIONEL 6 16946 3840 CHESAPEAKE  OHIO F9 WELL CAR NEW IN BOX
LIONEL 6 16946 3840 CHESAPEAKE OHIO F9 WELL CAR NEW IN BOX
$26.95
Time Remaining: 26d 56m
Buy It Now for only: $26.95
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: 29d 4h 39m
Buy It Now for only: $49.00
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: 29d 6h 14m
Buy It Now for only: $40.00
O Scale Lionel Chesapeake  Ohio F9 Well Car w 2 Reels Load NIB Lot SB2 63
O Scale Lionel Chesapeake Ohio F9 Well Car w 2 Reels Load NIB Lot SB2 63
$39.95
Time Remaining: 29d 9h 32m
Buy It Now for only: $39.95

Other O Scale train items recently purchased through this site:

PD F3002 F9 B kit
VINTAGE ATLAS O SCALE 2 RAIL F 9 DEISEL CHASSIS GOOD + CONDITION RUNS F R
O Scale Lionel Chesapeake Ohio F9 Well Car w 2 Reels Load NIB Lot SB2 63
LIONEL 6 16946 3840 CHESAPEAKE OHIO F9 WELL CAR NEW IN BOX
LIONEL F3 ORIGINAL PORTHOLES 9 RARE EYELIDS F9
Lionel Pennsylvania 6983 F9 Well Car 6 16983 NIB
Lionel Penn Central F9 Well Car 768122
LIONEL PENNSYLVANIA RR F9 WELL CAR 6 16903 WITH CABLE REELS MADE IN USA
LIONEL TRAINS NO 16983 6983 PENNSYLVANIA RR F9 WELL CAR VERY NICE
Lionel 6 16983 Pennsylvania 6983 RR F9 Well Car w ob
Lionel Pennsylania RR f 9 well car 6 16983 built in 1997 for boysorgirls unused
Lionel 6983 Pennsylvania Rail Road F9 Well Car W Cable Reels 6 16983 1997 C 9
Lionel CO Chesapeake Ohio F9 Well Car 6 16946
ATLAS O GAUGE 2 RAIL DC BURLINGTON NORTHERN F 9 DIESEL
LIONEL 16318 LL FLATCAR 16929 BC GONDOLA 16946 CO F9 WELL CAR ALL W REELS
Lionel 6 16983 6983 Pennsylvania RR F9 Well Car NIB Brand New C 10 O scale
ATLAS O GAUGE 2 RAIL DC SANTA FE WARBONNET F 9 DIESEL UNIT 2
LIONEL TRAINS 6 16983 PENNSYLVANIA RAIL ROAD F 9 WELL CAR WITH CABLE REELS
LIONEL 6 16946 Chesapeake Ohio F9 Well Car NIB 14 in FREE Ship Lower 48 States