What's the difference beween "Hot sale" and "Hot sell", are they the same?
What's the difference beween "Hot sale" and "Hot sell", are they the same? Which one is more often to use?

Question

What's the difference beween "Hot sale" and "Hot sell", are they the same? 
What's the difference beween "Hot sale" and "Hot sell", are they the same? Which one is more often to use?

Answer

A hot sale would happen when a store gives a special sale that has much lower prices then normal.
"There was a hot sale at Macy's.  All items were 50% off."

A hot sell is something that is being sold very fast and is very popular.  In such a case, the price would go up.
"iPads are the hot sell this Christmas season."