As for a lease for $200 that'll be really hard to snag. I know guys that are leasing new fords and pay in the low 400s. I believe one has an explorer and the other a fusion. Those are different cars so it may not be the best comparison, but my gut is that since there usually aren't many good deals on mustangs due to their popularity, it'd be extremely hard to lease one that low.
If you end up figuring something out financially and qualify for x plan (tons of info on it all over the net-even on their website), do note that it's best to try out different dealers in different cities and see how they play around with it. Location plays a role in pricing and different dealers do their own incentives all the time. For example, I live in Louisville where we have 2 huge Ford production plants, and it obviously plays a big role in terms of popularity and employment. Many major companies around here, including the one I work for, get X plan simply because of Fords popularity and presence in the city, and theres thousands of Ford employees here who get A plan. As a result, all the Ford dealer prices here tend to be a lot higher, even for Kentucky, a generally cheap state. We have numerous Ford dealers around town, and when I shopped around, most weren't even willing to haggle much on the price cause if I don't buy, there's probably a ford employee with A plan who will get $2000 knocked off and buy it. I drove an hour and 30minutes away to Lexington, KY, where Ford obviously doesn't play as big of a role there, and they had some insane dealer sales. The brand new 2016 V6 I ended up getting was advertised for $21,991 and after some haggling, I left that day paying $22,200 after fees and all. The cheapest V6 model advertised here in Louisville was $25,000 at the time. The prices are jacked up so they can still make $ off the Ford employees even after the A plan. Here's the catch-with the deal I got, I did not even end up using my X plan discount because the dealers in Lexington said that if someone qualifies for X plan, that takes away the dealer sale and they just take it off the MSRP. In my case, it would have costed me more to use the X plan than to just haggle some off the dealer sale. In Louisville, they have occasional small dealer sales and will take the A plan/X plan discounts off the sale (based off what I've heard) simply because they already have them priced above MSRP. So to sum it all up, if you can figure out a way financially to get a deal you want, it's all about location and the way each dealer is managed. Had I just stayed local and bought in Louisville, I would have paid $2000 more even with X plan than I did without X plan not even 100 miles away. There are also tons of random discounts out there that you can hunt down too. For example, I got $500 off because of me being a student. It's all a big strategic game, even with the X plan. Sometimes driving a little out of your away can save you a lot and you can end up with an unbelievable deal, just takes some patience.
Hope this helps...
And to those figuring out the percentage on X plan-if it helps, the X plan offer I was shown at the dealer was about $900 off the MSRP for a 2016 V6 6spd model.