Are seller concessions masking deeper discounts on sales prices?--EXPLODE--http://feeds.feedburner.com/~r/RealEstateBubbleDebate/~3/16388479/are_seller_conc.html--EXPLODE--Side-by-side competition driven by the rising inventory of unsold homes across Massachusetts is creating a new kind of bidding war: escalating financial incentives to help sell homes as soon as possible. Some time ago, the local MLS added a new...