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

KATO N gauge Chibi electrostatic my city tram 14 503 1 model railroad train
KATO N gauge Chibi electrostatic my city tram 14 503 1 model railroad train
$73.46
Time Remaining: 9d 12h 59m
Buy It Now for only: $73.46
Streetcar Tram Chicken Noodle Train KATO 14 501 2
Streetcar Tram Chicken Noodle Train KATO 14 501 2
$70.13
Time Remaining: 9d 12h 59m
Buy It Now for only: $70.13
SPECTRUM  UNITED TRACTION  STREET CAR  TROLLEY  On30 Scale Train NEW
SPECTRUM UNITED TRACTION STREET CAR TROLLEY On30 Scale Train NEW
$62.99
Time Remaining: 21d 3h 33m
Buy It Now for only: $62.99
Smallbrook Studio On30 Closed End Demi Tram Car
Smallbrook Studio On30 Closed End Demi Tram Car
$55.00
Time Remaining: 23d 3h 40m
Buy It Now for only: $55.00
SPECTRUM  CHRISTMAS  STREET CAR  TROLLEY  25127 On30 Scale Train NEW
SPECTRUM CHRISTMAS STREET CAR TROLLEY 25127 On30 Scale Train NEW
$89.99
Time Remaining: 25d 15h 54m
Buy It Now for only: $89.99
Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
$85.08
Time Remaining: 28d 12h 32m
Buy It Now for only: $85.08

Other On30 Scale train items recently purchased through this site:

Smallbrook Studio On30 Closed End Demi Tram Car
SPECTRUM UNITED TRACTION STREET CAR TROLLEY On30 Scale Train NEW
Kato Japan 14 503 1 Chibi Den Streetcar Tram Train N scale Railway model
KATO N gauge Chibi electrostatic my city tram 14 503 1 model railroad train
Streetcar Tram Chicken Noodle Train KATO 14 501 2
SPECTRUM CHRISTMAS STREET CAR TROLLEY 25127 On30 Scale Train NEW