Second one looks good, you could probably squeeze them For 500-1k on the discount but that’s about 11%. While some people seem to have gotten around 15, I wouldn’t say thats normal. 11-13 is more realistic for most.
The rebates should only get better as mentioned as the trucks become “older”.
Always a crap shoot on ordering, timing of delivery, etc. You'll probably be ok...but a respectable sales person will tell you, here is the maximum you'd pay if you ordered...
If we are talking on the lot trucks, always put your offer in % off from MSRP. If you go back through these threads, 2019's are in the 20% off MSRP range, 22% being a great deal. The longer those sit in the lot, the bigger your discount to MSRP should be.
2020's are in the 17%-18% range, with 20% being a great deal. If seen a few higher. You have to compare depreciation of a 2019, to the higher cost of the 2020's, etc.
If you are talking discount to invoice, 12-14% on a new truck is pretty decent.
I don't want to sound unhelpful, but if folks simply do the math, they can tell themselves if it is a "good deal" or not, based on doing just a bit of homework on this page, doing some comparisons to MSRP's, if you happen to find someone in your area, etc.
It all comes down to your comfort level in pushing your local dealer (which I'd always recommend buying from, especially if you plan on a long relationship, service, parts, etc.). In some cases, such as less common Black Appearance Group 1500 Limiteds, you may find you can't push as hard, as they can't keep them on the lot more than a week or two.
Anyway...spend 20 minutes flipping through these pages, start with the last month or so, work toward today...you'll find a wealth of information that may save you a few hundred, or a few thousand dollars.