Deliverymeds question.

I am new to this MoM thing. I have one purchase under my belt from SFD. I am very pleased with the outcome and have been obsessively surfing others. I have seen nothing but good things about DM and the prices are very good. I guess my question is whether there is always low prices there? Meaning 4 and 5 a gm. I want to wait until next month to order but if these prices are out of the ordinary I should probably order early....