Your agency may allow—
(a)
Written commercial appraisals conducted by an appraisal firm or trade organization; and
(b)
Retail value appraisals where the value of the gift may be ascertained by reviewing current and reliable non-discounted retail catalogs, retail price lists, or retail Web site valuations.
Code of Federal Regulations
[74 FR 2396, Jan. 15, 2009]