Staying with family at MFC later this week (17-24 Feb) and, depending on their incentive will probably listen to the sales presentation. Other than "NO", any good comebacks to counter their "must buy now" sales pitch?
Nope, no comebacks, not unless you want to get into a long drawn-out process where you both end up bad-tempered and feeling like you've completely wasted your time.
Go in saying immediately that you will not be making a final decision today about whether to buy or not, because that's how you approach every purchase in your life which requires an ongoing financial commitment. Tell them you will leave there and do whatever further research you need to do within the time frame they give you before the purchase terms expire, and you will let them know your decision before the expiration. If they then begin their presentation by saying that you will have to give an answer before you leave there today, stop them by saying if that's the case, your answer will be "no."
You'll know soon enough if staying means that you're going to be bombarded with ridiculousness from an antagonistic fool who's going to make you angry and defensive, or, if you might have a shot at actually learning something from a knowledgeable rep who wants you to be happy with what s/he's trying to sell you. Then it's your informed choice whether to stay, whether any gifts will be worth the upcoming experience. There isn't any law that says you must ask questions during these things. If you stay knowing that s/he will demand a yes/no answer at the end, just sit quiet throughout and then say, "no, thanks."
Don't misunderstand, I don't have a problem with going to presentations just for the gifts. But I think that laying all the cards on the table at the outset, setting the limits that you both will enforce, makes the entire process at least a fair fight. It's not any more fair for you to waste the rep's time than it is for him/her to waste yours.
Numismatist has brought up a very good question for your presentation. The property tax issue at MFC could be a nightmare in the coming years depending on how things progress. Maui timeshares faced the possibility of a similar exorbitant tax rate hike that was eventually not enacted, but it made for a fairly long period of uncertainty for owners there. Hopefully your rep will at least acknowledge that it's a concern for you, but maybe you'll get lucky and s/he'll be able to actually delve into it in detail.
Puck's question is a good one, too. Recent reports are that a resale market for DC Points is being developed by Marriott, and, the usage restrictions of re-sold DC Points may not be as "draconian" as we first surmised. But there hasn't been any official communication from Marriott about either subject. As well, the costs associated with re-selling DC Points could be prohibitively high for both seller and buyer - it would be nice to get official confirmation from Marriott detailing which of the many costs stipulated in the governing docs will be strictly enforced and which will not be.
Good luck. Let us know how it goes.