1. Find the country and date of issue.Someone with extensive/specialized world stamp catalogs.
2. Examine for an inscription.Someone with a magnifying glass.
3. Pay attention to stamp watermarks.Someone with a watermark tray and some lighter fluid.
4. Watch out for unusual stamp prints.Someone who has access to stamp forums or stamp magazines which might report these.
5. Identify the stamp's catalogue number.See 1.
6. Type of paper used.See 1.
7. Color shadesSee 1
8. Host of other variations.
See 1.
9. Help identify which stamps need for grading.Someone who can collate/catalog/assess items 1 to 8.
10. Help us provide prices for each of the stamps.Someone who has a) stamp catalogs for catalog price. b) access to
ebay for more realistic prices. c) has a knowledge of auction house prices realized for a price range regarding "better" items.
It is possible to have just one person to do all that but even experts get it wrong occasionally so perhaps a "team" effort is more what you need.