What do you call a person with a lot of detail?

How much is a lady lavery 100 banknote from 1928 worth? What do you call someone that collects medals? How much are Michael Jordan Wheaties boxes worth unopened? Which English coins are silver? How much are Sarwak stamps worth? Can I convert my PA-63 from 9x18 cal. to 380 acp? What is a faberge' egg? How much would a coin collection from a GGrandfather with several coins such as liberty pennies from the 1790 be worth? How long has Royal Sealy China been manufactured? What is a Crown Pottery 346 serving plate worth? What is a L F Nonnast furniture? What is a 1911 Georgivs v dei gra Britt omn rex fid def ind imp half penny worth? 794 Cal ripkin jr card value 1992? What value do you believe you could add at your work team? What is value of signed basketball by New York Knicks championship team? My 1960 Seventy Centavos coin is silver in color has a woman with a volcano behind her on one side but the other side is completely blank what is the value if anything? How much is L. 100 italiana 1966 coin worth? 95.00 euros is how many us dollars? Was the half crown minted in 1968 or 1969? Is it only cash at a flea market?