We've searched the internet and found the largest collection of On30 Scale trains for sale is on eBay. Below are the listings for 'boxcar'.

Bachmann On30 Scale Train Box Car Murphy Roof Oxide Red 2 box 26552
Bachmann On30 Scale Train Box Car Murphy Roof Oxide Red 2 box 26552
$91.82
Time Remaining: 1d 9h 22m
Buy It Now for only: $91.82
Bachmann On30 Scale Train 18 Freight Cars Box Car 2 per box 26501
Bachmann On30 Scale Train 18 Freight Cars Box Car 2 per box 26501
$91.82
Time Remaining: 1d 9h 22m
Buy It Now for only: $91.82
Bachmann On30 Scale Train 18 Box Car W Murphy Roof Gray 2 box 26553
Bachmann On30 Scale Train 18 Box Car W Murphy Roof Gray 2 box 26553
$91.82
Time Remaining: 1d 9h 22m
Buy It Now for only: $91.82
Bachmann On30 Scale Train Box Car South Pacific Coast Sunset Logo 27002
Bachmann On30 Scale Train Box Car South Pacific Coast Sunset Logo 27002
$45.91
Time Remaining: 1d 9h 24m
Buy It Now for only: $45.91
Bachmann On30 Scale Train Box Car Mineral Red Data Only 27098
Bachmann On30 Scale Train Box Car Mineral Red Data Only 27098
$45.91
Time Remaining: 1d 9h 24m
Buy It Now for only: $45.91
Bachmann On30 Scale Train Box Car Oxide Red Data Only 27097
Bachmann On30 Scale Train Box Car Oxide Red Data Only 27097
$45.91
Time Remaining: 1d 9h 24m
Buy It Now for only: $45.91
Bachmann On30 Scale Train Box Car White Pass  Yukon 27001
Bachmann On30 Scale Train Box Car White Pass Yukon 27001
$45.91
Time Remaining: 1d 9h 24m
Buy It Now for only: $45.91
Bachmann HOn30 Scale Narrow GaugeTrain Box Van Blue 77202 Thomas
Bachmann HOn30 Scale Narrow GaugeTrain Box Van Blue 77202 Thomas
$48.17
Time Remaining: 1d 9h 27m
Buy It Now for only: $48.17
Bachmann HOn30 Scale Narrow Gauge Train Box Van Red 77203 Thomas
Bachmann HOn30 Scale Narrow Gauge Train Box Van Red 77203 Thomas
$48.17
Time Remaining: 1d 9h 27m
Buy It Now for only: $48.17
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
$36.00
Time Remaining: 1d 21h 50m
Buy It Now for only: $36.00
HAWTHORNE VILLAGE On30 BACHMANN CONFEDERATE CIVIL WAR J E B STUART BOX CAR 005
HAWTHORNE VILLAGE On30 BACHMANN CONFEDERATE CIVIL WAR J E B STUART BOX CAR 005
$59.99
Time Remaining: 5d 12h 18m
Buy It Now for only: $59.99
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 315 nd
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 315 nd
$68.14
Time Remaining: 7d 49m
Buy It Now for only: $68.14
SN3 1 TOMALCO DRGW 3000 SERIES BOX CAR KIT
SN3 1 TOMALCO DRGW 3000 SERIES BOX CAR KIT
$25.00
Time Remaining: 10d 12h 3m
Buy It Now for only: $25.00
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 605
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 605
$68.14
Time Remaining: 10d 23h 43m
Buy It Now for only: $68.14
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 3145 n
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 3145 n
$68.04
Time Remaining: 11d 21h 3m
Buy It Now for only: $68.04
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 606
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 606
$68.14
Time Remaining: 16d 2h 7m
Buy It Now for only: $68.14
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 603
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 603
$68.14
Time Remaining: 17d 4h 48m
Buy It Now for only: $68.14
On30 Fat Albert Boxcar Conversion to fit Bachmann 18ft flat car
On30 Fat Albert Boxcar Conversion to fit Bachmann 18ft flat car
$37.00
Time Remaining: 24d 6h 19m
Buy It Now for only: $37.00
On3 On30 CRAFTSMAN WISEMAN COLORADO  SOUTHERN RIO GRANDE SOUTHERN BOXCAR KIT
On3 On30 CRAFTSMAN WISEMAN COLORADO SOUTHERN RIO GRANDE SOUTHERN BOXCAR KIT
$49.95
Time Remaining: 29d 12h 16m
Buy It Now for only: $49.95

Other On30 Scale train items recently purchased through this site:

On30 Fat Albert Boxcar Conversion to fit Bachmann 18ft flat car
ON3 ON30 SILVER CITY MODELS DRGW 1872 12 4 WHEEL BOX CAR KIT
On3 On30 CRAFTSMAN WISEMAN COLORADO SOUTHERN RIO GRANDE SOUTHERN BOXCAR KIT
SN3 1 TOMALCO DRGW 3000 SERIES BOX CAR KIT
Bachmann On30 Scale Train Box Car Mineral Red Data Only 27098
Bachmann On30 Scale Train Box Car South Pacific Coast Sunset Logo 27002
Bachmann On30 Scale Train 18 Freight Cars Box Car 2 per box 26501
Bachmann On30 Scale Train Box Car Oxide Red Data Only 27097
HAWTHORNE VILLAGE On30 BACHMANN CONFEDERATE CIVIL WAR J E B STUART BOX CAR 005
Bachmann On30 Scale Train 18 Box Car W Murphy Roof Gray 2 box
Bachmann On30 Scale Train Box Car Murphy Roof Oxide Red 2 box 26552
Bachmann On30 Scale Train Box Car White Pass Yukon 27001
Bachmann HOn30 Scale Narrow Gauge Train Box Van Red 77203 Thomas
Bachmann HOn30 Scale Narrow GaugeTrain Box Van Blue 77202 Thomas
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 3145 n
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 606
BINKLEY KIT BUILT HOn3 NARROW GAUGE DENVER RIO GRANDE DRGW BOX CAR WAGON 315 nd
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 605
BINKLEY KIT BUILT HOn3 NARROW GAUGE DSPPRR DENVER SOUTH PARK REEFER BOX CAR 603