Most mass market items don't require appraisal.
You set the price to cover all your costs and add in a profit.
For an appraisal on collectibles, as at the dealer you bought from.
For example, there are at least five philatelic appraisers who provide Certificates appraising Canadian stamps that I know of.
Or do you actually mean "appraisal" or something else?
https://www.investopedia.com/terms/a/appraisal.asp
