Jackpot recs, while being way too hipster, has decent prices on used vinyl around $5 for newer punk and hardcore LP's, you have to look, but every now and again you can find a gem.
If you're on Hawthorne, while a totally cheesy place, Coney Island Dogs around 35th and Hawthorne has completely kick ass happy hour deals. You can eat silly hotdogs and get radical for pretty cheap.
Let's drink some beers together soon!
FYI, the Zombie House is going to do shows once a month or once every other month...it'll probably be by invite only, but they just had Bastards of Young and Secretions play on Wednesday and though it was competing with 3 other kick ass PDX shows a bunch of folks came out and got down. Good times.
Also, I concur that 2nd Ave, Centaur very fun/good places. Glad you found Green Noise as well, that and Discourage are the best of SE.