But nobody would buy your tickets unless either a) you sold them cheaper than the face value, meaning you'd be making a loss every time the Albion played away or b) the match sold out, which only happens three or four times a season.
Just accept your place in the queue. You're a STH and you've been to some away matches this season. You don't deserve more than the people who go up and down the country every single weekend, but you have more than enough to get a ticket for Millwall (and 99% of away games for that matter) if you want one.
As I spend roughly £500 per home game, I would gladly lose a few quid if it guaranteed me a ticket for Liverpool away in round 6.