Putting the deposit down has at least secured you the price the rep quoted you for now. But, as others said, take your time and be sure that you understand DVC before finalizing your purchase.
There are better deals out there for the older resorts and you can save money going that way. However, if you want BLT, then going direct through Disney right now is the easiest option. We bought in this past winter because we wanted BLT, even though we could have gotten SSR via the resale market for $4000 - $5000 less. But, in the end, since we bought in to DVC as a long term commitment, it was worth spending a few hundreds dollar more per year to be at BLT.
And, if in the next few weeks, Disney comes out with incentives for new buyers that lowers the price, ask your guide to re-do the contract. We did that as well as we had not yet closed when better ones came out and they just re-did things for us.
Good luck!