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

On3 On30 O CRAFTSMAN KIT RAGGS TO RICHES RIO GRANDE SOUTHERN RICO DEPOT NEW
On3 On30 O CRAFTSMAN KIT RAGGS TO RICHES RIO GRANDE SOUTHERN RICO DEPOT NEW
$315.00
Time Remaining: 2d 4h 48m
On3 CRAFTSMAN SSLTD RIO GRANDE SOUTHERN FORD INSPECTION CAR KIT UNSTARTED
On3 CRAFTSMAN SSLTD RIO GRANDE SOUTHERN FORD INSPECTION CAR KIT UNSTARTED
$69.95
Time Remaining: 5d 9h 40m
Buy It Now for only: $69.95
On3 On30 WISEMAN RIO GRANDE SOUTHERN MODEL T FORD INSPECTION CAR 1 KIT SSLTD
On3 On30 WISEMAN RIO GRANDE SOUTHERN MODEL T FORD INSPECTION CAR 1 KIT SSLTD
$49.95
Time Remaining: 7d 1h 51m
Buy It Now for only: $49.95
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
$64.16
Time Remaining: 8d 21h 14m
Buy It Now for only: $64.16
HO HOn3 Scale Durango Press HOn3 Rio Grande Southern Flanger 01 Kit DP 51
HO HOn3 Scale Durango Press HOn3 Rio Grande Southern Flanger 01 Kit DP 51
$29.79
Time Remaining: 10d 9h 50m
Buy It Now for only: $29.79
On3 On30 WISEMAN MODEL SERVICES RGS RIO GRANDE SOUTHERN PLOW FLANGER 02 KIT
On3 On30 WISEMAN MODEL SERVICES RGS RIO GRANDE SOUTHERN PLOW FLANGER 02 KIT
$149.95
Time Remaining: 11d 5h 23m
Buy It Now for only: $149.95
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN DRAG FLANGER 01 KIT RGS
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN DRAG FLANGER 01 KIT RGS
$59.95
Time Remaining: 12d 50m
Buy It Now for only: $59.95
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEW
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEW
$329.95
Time Remaining: 12d 8h 40m
Buy It Now for only: $329.95
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEWb
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEWb
$329.95
Time Remaining: 13d 8h 41m
Buy It Now for only: $329.95
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
$64.16
Time Remaining: 15d 17h 28m
Buy It Now for only: $64.16
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN OUTFIT CAR 01789
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN OUTFIT CAR 01789
$69.95
Time Remaining: 16d 10h 45m
Buy It Now for only: $69.95
Durango Press HOn3 Rio Grande Southern Flanger 1 Kit DP 51
Durango Press HOn3 Rio Grande Southern Flanger 1 Kit DP 51
$29.00
Time Remaining: 19d 9h 52m
Buy It Now for only: $29.00
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3470
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3470
$45.00
Time Remaining: 21d 8h 46m
Buy It Now for only: $45.00
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3262
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3262
$45.00
Time Remaining: 21d 8h 49m
Buy It Now for only: $45.00
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3146
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3146
$45.00
Time Remaining: 21d 8h 59m
Buy It Now for only: $45.00
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3438
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3438
$45.00
Time Remaining: 21d 9h 2m
Buy It Now for only: $45.00
Durango Press 59 HO Denver  Rio Grande Western Water Tower HOn3 Kit
Durango Press 59 HO Denver Rio Grande Western Water Tower HOn3 Kit
$48.25
Time Remaining: 23d 20h 13m
Buy It Now for only: $48.25

Other On30 Scale train items recently purchased through this site:

ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3438
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3262
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3470
ON30 AMS 3000 Series Box Car Denver and Rio Grande Western DRGW 3146
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN OUTFIT CAR 01789
Durango Press 59 HO Denver Rio Grande Western Water Tower HOn3 Kit
On3 On30 WISEMAN RIO GRANDE SOUTHERN MODEL T FORD INSPECTION CAR 1 KIT SSLTD
On3 On30 WISEMAN MODEL SERVICES RGS RIO GRANDE SOUTHERN PLOW FLANGER 02 KIT
On3 CRAFTSMAN SSLTD RIO GRANDE SOUTHERN FORD INSPECTION CAR KIT UNSTARTED
On3 On30 WISEMAN MODEL SERVICES RIO GRANDE SOUTHERN DRAG FLANGER 01 KIT RGS
HO HOn3 Scale Durango Press HOn3 Rio Grande Southern Flanger 01 Kit DP 51
On3 On30 O CRAFTSMAN KIT RAGGS TO RICHES RIO GRANDE SOUTHERN RICO DEPOT NEW
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEWb
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 3145 n
Durango Press HOn3 Rio Grande Southern Flanger 1 Kit DP 51
On3 On30 O CRAFTSMAN RAGGS RIO GRANDE SOUTHERN PLACERVILLECO DEPOT KIT NEW