I'd say 30% is not fantastic for Panerai these days; if you know a decent gray dealer in HK, Indonesia or even Singapore, you can bid 40% offers and I can guarantee you at least a few of them would bait, most can't move ANY Panerai stock so considering they get them at 50-60% off via a backdoor of ADs, they skill making some money on each so give it a go.
I personally have no desire to invest in gen contemporary Panerai as I think it may get even cheaper in coming years due to their quickly becoming unfashionable size and bulk, so anything above 42mm will quickly turn into dead wood (from seller's point of view) in a year or two. Pre-V and early Swiss will prob keep most of their value at current rate, still prob will have to discount 15-20% to move them if it comes to it.
And these are gen for sure, there are countless gray dealers just like that in HK and they are guaranteed to sell authentic stock, no one pisses around with rep there nowadays...you will def get full set, dealer stamp and factory warranty with these...
I actually agree with Archie (however painful it is), the golden days of Panerai are well behind them and it's interesting to see what Richemont will try to revitalise and reposition the brand. They should begin by cutting the production size and the line-up by a third, and taking 25-35% of theirs RRP to bring it in line with the market.