Depends on whether you want new or used. If new, considering that production has stopped and we don't know when the Gen 3s will be released, now could be a great time to get a Gen 2. Of course, if Ford announces Gen 3 coming out soon, with big improvements and similar price to Gen 2, Gen 2 prices should go down.
If you want a used Gen 2. I would wait a bit. There will be some that want to trade in their Raptor for a TRX. There will be many that want to go with the latest gen F150. If you can wait longer, there will be even more that trade in for the Gen 3 Raptor.
But as other stated, you may save some money but you won't be driving a Raptor while you wait.