| Business | Phone |
| Weinstock Stamps & Covers Po Box 92033, Portland 97292 | (503) 762-4116 |
| Unique Estate Appraisals 1937 Ne Broadway St, Portland 97232 | (503) 287-4200 |
| Bayard's Classic Stamps Portland 97210 | (503) 248-0879 |
| Robert A Beall Autioneering 7940 Se Division St, Portland 97206 | (503) 788-3681 |
| Oregon Stamp Society 4828 Ne 33rd Ave, Portland 97211 | (503) 284-6770 |