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'.

ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
$26.00
Time Remaining: 9d 1h 19m
Buy It Now for only: $26.00
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA BUILT
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA BUILT
$65.00
Time Remaining: 15d 16h 9m
Buy It Now for only: $65.00
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: 22d 16h 5m
Buy It Now for only: $26.00
O On3 On30 1 48 WISEMAN OKT 35 FRUEHAUF GONDOLA TYPE ROCKSANDGRAIN TRAILER KIT
O On3 On30 1 48 WISEMAN OKT 35 FRUEHAUF GONDOLA TYPE ROCKSANDGRAIN TRAILER KIT
$34.95
Time Remaining: 24d 18h 32m
Buy It Now for only: $34.95

Other On30 Scale train items recently purchased through this site:

ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 17 4 WHEEL GONDOLA CAR KIT
ON3 ON30 SILVER CITY MODELS DRGW 1872 14 4 WHEEL GONDOLA BUILT
O On3 On30 1 48 WISEMAN OKT 35 FRUEHAUF GONDOLA TYPE ROCKSANDGRAIN TRAILER KIT