There’s always the possibility she has a contract for X amount of Alfalfa loads for a certain price through the year. She may be needing to fill a quota.
There are big Alfalfa farms especially around Casa Grande, AZ that offer such arrangements.
There are also some people that buy loads from there and sell a few bales here and there for substantially more.
It is rumored that the hay from there is not the greatest and the fields get little rest. Good hay depends on several factors that can be hard to achieve in large production settings.