I have gotten this from a few who have asked me about timesharing. Truth is, they already have it in their heads that it's a "ripoff," to quote another poster above. They can ask you how you do it, and you can take the time to explain, but they still look at you like "what's the catch?"
The truth is, there are a lot of catches. You just have to be aware of them because they're pretty much the same catches everywhere. People have already covered them pretty well everywhere else on this site.
I also got my first timeshare for a dollar, and the seller paid the transfer fees and first year maintenance. I ended up trading it at the resort for full value toward something that better suited my family's needs, and I walked away happy because I liked the resort, the salesperson, and the value I got (low annual maintenance for lots of points). Before timeshares, we had taken one full getaway vacation in ten years. Since then, we go every year, and have also exchanged into downtown San Francisco to visit my stepson and daughter-in-law, have gone to the Poconos, and the Cape. Mostly, we love going to our annual getaway in the White Mountains, and we look forward to it every year. It's a guaranteed vacation that we all love, about a seven hour drive from home which keeps the costs down. We have a three-way lockoff, so we use part of it and bank points for the rest and use that for an extra vacation every couple years.
We ended up buying another studio for a buck just for the points at the same resort, and we always have enough points now that I can get a nice exchange vacation for my in-laws every fall to go leaf peeping at our home resort, and they just pay the maintenance on the second unit. They used to spend almost $1K for a hotel room in the Whites for a week every fall. Now they pay ~$450 (they pay the maintenance on the small unit + their guest cert) for a 1BR with a full kitchen, sometimes with an extra bathroom. For our own vacation, after the RCI fee and exchange fees, I'm pretty sure I'm still paying less for a week in the Whites than I would for a hotel room, and I get a couple bedrooms, a couple bathrooms, and an extra kitchen for that. Can't beat it, and it's not the hassle those who look at me funny about timesharing think it must be.