I'm a little late posting this, which means you might have missed out on a couple of good opportunities to boost your library of M/M romance, but there's still time! Thing is, Dreamspinner Press is having a different sale everyday from now until December 31st, but in order to find out what it is that day you have to go by the on-line store and see for yourself.
Or you can sign up for the newsletter the first time you stop in there, and then you'll get the news about the sales delivered right to you. That's probably easiest.