I haven't bought a resale, so this is all from what I've read, not what I've experienced personally!
I gather that the main differences between buying from DVC and buying a resale are the price per point you have to pay (obviously) and the closing costs on the contract. The other deciding factor may be the state of the reasle contract regarding banked / useable / borrowed points, but this should be reflected in the price per point being asked.
The Timeshare Store is a site sponsor, so you can link directly to them from the US DVC forum, and if you do a search I'm sure you'll find plenty of other brokers mentioned on those boards.
From my understanding of it, the closing costs are around $400 - 500 regardless of the size of the contract, making smaller contracts more expensive per point once you take that into the equation. Some posters on the US DVC forum have reported getting those costs paid by the vendor, and it seems 'normal' to haggle over the asking price (I suppose in the same way that we might offer less than the asking price for a property here).
When I first started looking into DVC seriously, I couldn't understand why anyone would want to pay full price through DVC for the same product and with the same ending date of 2042 as a cheaper resale, but guess how I bought in the end? Yes, from DVC

. At the end of the day, I felt more comfortable handing over such a large committment to a known company like Disney than to a resale agent in a country where I am unfamiliar with the legal processes. But that's just me being naturally very cautious!
My best advice would be to read the US DVC boards for a while (if you haven't already done so) - there are many threads with information about buying resales, but obviously mainly from a US perspective.
Good luck, and let us know how you get on
