Punk concerts are awesome and don't cost a fortune. Goldfinger is one of my favorite bands. I've seen them twice (GM Place and Commodore) a few years ago and caught the drumsticks that they threw into the crowd at the end of the show. All of their albums are just awesome.
Never seen Less than Jake headline their own concert in Vancouver.
If you're into those bands, you'll quickly expand and listen to all types of punk, punk rock, emo, alterantive punk etc.
Bouncing Souls, Dropkick Murphy's, Floggy Molly are all coming to Vancouver, I would check them out as they will put on a good show.