I have owned Cajun made accordeons and Hohners and other one row boxes.
The Castagnari has the lightest touch, fastest keyboard I have ever played. I have owned over 50 boxes and the Castagnari is the best built of the bunch and less expensive than the majority of Cajun made accordeons. Castagnaris are musical instruments compared to Cajun folk art.
Check the resale prices of Castagnari melodens compared to Cajun made a accordeons.. that will give you a clue.