What statistical model to use for group comparison where data is not normally distributed and variances are unequal

The independent variable ranges from 1 to 5 and is continuous (I can bin it to make it discrete though). The dependant variable ranges from 1 to 15000 and is discrete. I am trying to look at whether products with 5 star ratings have more sales than products with 4 star ratings and whether products with 4 star rating have more sales than products with 3 star rating and so on.

comparison continuous data datascience distributed independent look normally products star statistical