Need to ask about a lot?

SAUDI ARABIA - 1975 - 1982 NEVER HINGED MINT COLLECTION of Commemorative issues, incl. 1975 Faisal Memorial set, 1975 Mecca Conference set, 1975 World Food Program set, 1976 Mecca Conference 4p, 1976 TV Anniversary 4p, 1977 King Khalid sets with correct & incorrect dates, 1977 Damman Railway 20h, 1977 'Four Imams' se-tenant block, 1979 Stamp Anniversary set, 1980 Year of the Child set, 1981 Hegira set, 1981 Telecommunications Achievements set, 1981 Unification 50th Anniversary set etc (100+ stamps)