I bought resale. The premium for buying directly from Four Seasons is just too great to justify that. As long as you use a reputable closing company, there is nothing to fear from buying a resale week.
If you want a Four Seasons "approved" broker, then I would suggest Judi at Smart Choice Timeshare Realty.
www.timeshareaz.com She is very nice to work with, honest, and knows the Four Seasons product extremely well.
If you are okay with buying from a non-approved broker, then you might check eBay,
www.myresortnetwork.com ,
www.redweek.com , etc. There are some good bargains out there if you look for them. Sometimes you have to make an offer to several different sellers before you find someone who will accept. I am okay with that, but many people do not enjoy real estate negotiations. Personally, I would not pay more than $20,000 for an annual platinum week or $12,000 for an annual gold week.
Note: Four Seasons has ROFR (right of first refusal), but I am told that they very, very rarely exercise it. So I would not let that deter you from offering well below the asking price on a resale week.
Steve