I'm looking at a deal on a refurb IPP 12.9 128 gb wifi + cellular from Apple for $150 off normal prices - I doubt there will be a discount more than that once the new models are released later this month. Should I wait to see if the refurbs or new stock of the prior model (stock is very limited as it is and likely to stay limited once new models are announced) get discounted once the new ones are announced, or snatch it up while I can?