In my estimation, DVCRM is the place to sell high, not buy low - if I were going to sell, I think that's who I would use. I made several offers to them early on when first getting into the resale game, and the agent I worked with was incredibly nice, but it was very much like she was trying to educate me just how much higher I would need to come up to if I actually wanted to get the contract.
I will say, if I had gone down the road of wanting resale BLT Oct UY, I would have ended up caving and likely buying through them at whatever price I could get because BLT Oct UY contracts are quite rare and they tend to go pretty fast when they come along.
And, if you know exactly what you want, don't want to wait, paying the premium for an average deal over a bottom-of-the-market deal may well be worth it.