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

Grandt Line DRGW Dropbottom gondola 800 Series Kit 3072
Grandt Line DRGW Dropbottom gondola 800 Series Kit 3072
$30.00
Time Remaining: 1d 14h 22m
Grandt Line DRGW Dropbottom Gondola 700 Series Kit 3051
Grandt Line DRGW Dropbottom Gondola 700 Series Kit 3051
$29.99
Time Remaining: 1d 14h 31m
HOn3 BLACKSTONE DRGW DROP BOTTOM GONDOLA WEATHERED
HOn3 BLACKSTONE DRGW DROP BOTTOM GONDOLA WEATHERED
$55.00
Time Remaining: 3d 10h 7m
Buy It Now for only: $72.00
San Juan Car Co DRGW Drop Bottom Gondola Train Set 724 857
San Juan Car Co DRGW Drop Bottom Gondola Train Set 724 857
$600.00
Time Remaining: 3d 12h 33m
Buy It Now for only: $600.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
$26.00
Time Remaining: 12d 16h 15m
Buy It Now for only: $26.00
HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB
HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB
$74.99
Time Remaining: 23d 9h 2m
Buy It Now for only: $74.99
2 car set 1203 Scale Narrow Gauge Fall River Gondola flat car
2 car set 1203 Scale Narrow Gauge Fall River Gondola flat car
$260.00
Time Remaining: 24d 8h 37m
Buy It Now for only: $260.00
Bachmann On30 Scale Train 18 Freight Cars Low Gondola 2 box 26531
Bachmann On30 Scale Train 18 Freight Cars Low Gondola 2 box 26531
$69.24
Time Remaining: 32d 11h 54m
Buy It Now for only: $69.24
Bachmann On30 Scale Train 18 Freight Cars High Gondola 2 box 26541
Bachmann On30 Scale Train 18 Freight Cars High Gondola 2 box 26541
$74.51
Time Remaining: 32d 11h 54m
Buy It Now for only: $74.51
Bachmann On30 Scale Train Gondola White Pass  Yukon 27203
Bachmann On30 Scale Train Gondola White Pass Yukon 27203
$39.13
Time Remaining: 32d 11h 58m
Buy It Now for only: $39.13
Bachmann On30 Scale Train Gondola Oxide Red Data Only 27201
Bachmann On30 Scale Train Gondola Oxide Red Data Only 27201
$39.13
Time Remaining: 32d 11h 58m
Buy It Now for only: $39.13
Bachmann On30 Scale Train Gondola Mow Gray Data Only 27202
Bachmann On30 Scale Train Gondola Mow Gray Data Only 27202
$39.13
Time Remaining: 32d 11h 58m
Buy It Now for only: $39.13
Bachmann On30 Scale Train Gondola Cars Oxide Black Data Only 27298
Bachmann On30 Scale Train Gondola Cars Oxide Black Data Only 27298
$39.13
Time Remaining: 32d 11h 59m
Buy It Now for only: $39.13

Other On30 Scale train items recently purchased through this site:

HOn3 BLACKSTONE DRGW DROP BOTTOM GONDOLA WEATHERED
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
San Juan Car Co DRGW Drop Bottom Gondola Train Set 724 857
Bachmann On30 Scale Train Gondola Cars Oxide Black Data Only 27298
2 car set 1203 Scale Narrow Gauge Fall River Gondola flat car
Bachmann On30 Scale Train Gondola Oxide Red Data Only 27201
Bachmann On30 Scale Train 18 Freight Cars High Gondola 2 box 26541
Grandt Line DRGW Dropbottom Gondola 700 Series Kit 3051
Bachmann On30 Scale Train 18 Freight Cars Low Gondola 2 box 26531
Grandt Line DRGW Dropbottom gondola 800 Series Kit 3072
Bachmann On30 Scale Train Gondola White Pass Yukon 27203
Bachmann On30 Scale Train Gondola Mow Gray Data Only 27202
HO HO HO HOLIDAY GONDOLA CAR HAWTHORNE RUDOLPHS CHRISTMAS TOWN EXPRESS NIB