You're right, upon reviewing the search results I don't see an exact match for the Casio FX 991AZ plusII at R519. The closest options I see are: - Casio FX-991ZA Plus II Advanced Scientific Calculator for R519 - Casio FX-991 Za Plus II Scientific Calculator for R629 - Casio FX-991 Plus II Scientific Calculator FX-991ZAPLUSII for R620 Apologies that I couldn't verify the specific R519 price you mentioned. As an experimental bot, my search results may not always match up perfectly. Please let me know if you need any other options for a Casio scientific calculator! I'm here to help point you towards the best deals.