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

ON30 Spectrum Billboard Reefer John Harvards 27467 Freight Car
ON30 Spectrum Billboard Reefer John Harvards 27467 Freight Car
$54.99
Time Remaining: 11d 17h 34m
Buy It Now for only: $54.99
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
$65.19
Time Remaining: 13d 11h 48m
Buy It Now for only: $65.19
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
$65.19
Time Remaining: 23d 11h 58m
Buy It Now for only: $65.19
New Bachmann USA 27464 American billboard reefer freight car Pensylvania Union
New Bachmann USA 27464 American billboard reefer freight car Pensylvania Union
$27.99
Time Remaining: 25d 2h 51m
Buy It Now for only: $27.99

Other On30 Scale train items recently purchased through this site:

New Bachmann USA 27464 American billboard reefer freight car Pensylvania Union
ON30 Spectrum Billboard Reefer John Harvards 27467 Freight Car
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 606