No, it sounds like you did the right thing: attended a sales pitch, liked the product, did a little digging, and found a decent deal on eBay. Folks just wanted to make sure you did, indeed, pay no more than a $1 or so for this. 
I am not a PVC owner, but I would start withe the advice that tschwa2 gave you. Give it a couple of weeks, and then call Palmera about accessing the portal. They should be able to guide you from there.
TBH, sounds like a good way to get into timesharing, at a low initial cost, with a property that you like. You'll learn a lot by trying to use it, and, if after a few years, it's not meeting your needs, you can always give it away again.
I am not a PVC owner, but I would start withe the advice that tschwa2 gave you. Give it a couple of weeks, and then call Palmera about accessing the portal. They should be able to guide you from there.
TBH, sounds like a good way to get into timesharing, at a low initial cost, with a property that you like. You'll learn a lot by trying to use it, and, if after a few years, it's not meeting your needs, you can always give it away again.