Common/Uncommon playset for $30? Yeah, ok, that sounds pretty good. (You can get Corrupted Crossroads and W/R manlands for under $8 a set right now too.) I grabbed a set of the Thought-Knots at 14 because I don't think that card goes down (tho I was wrong on Dark-Dwellers, overpaid by a few bucks because people are dramatically undervaluing what's likely the best card in the set.)
I grabbed Knots at about the same price. I grabbed Reality Breaker at around the same too, just in case.