I am looking for either a Mossberg 500 or Remington 870. Would prefer 18.5" barrel and at least a 5 round capacity, more rounds would be better. Condition doesn't have to be perfect, or even decent, just needs to function. I am not looking to break the bank on this, I am working with a relatively tight budget (<$300) so keep that in mind when letting me know what you've got. Thank you.