You have a schema containing lots of MyISAM tables that may possibly be stale due to code no longer updating them. You can rank them by date of most recent update.
mysql -D PriceComparison -NBe"show table status like '%'" \ | \ cut -f1,2,11,12 \ | \ sort -k 5,6
I omitted a grep MyISAM because the InnoDB tables will be grouped together with NULL dates so aren’t a problem. The sneaky problem to avoid is that sort sees a datetime field as being two fields. To sort the list by creation date you would use sort -k 3,4.