Overview Malta Stamp Catalogues
Malta Stamp Catalogues (books)

Malta
Malta Stamp Auctions/Marketplaces
Catawiki
Ebay
Stampden Malta Stamps

Malta Online Stamp Catalogues
Michel (German/English) – Most complete online stamp catalogue with actual prices (subscription required)
Colnect (all language) – Colnect (premium) has auto-matching, best matches and an extensive free stamp catalogs
Maltapost (English) ā Excellent complete free catalogue for Malta