Cheap!
They can range, but last year I went to the final home game, and while I was standing outside of Gate 3 waiting for my friend with our tickets, I saw MANY people going up to the scalpers and selling their tickets for $10-$20 (tickets that have a ticket value of $40-$50).
You can, about 3-4 hours prior to a game, buy tickets at the box office for like $55 or so depending on where you are sitting.
I get my tickets from RPB members not going to a game, they usually sell them to me for less than face value (because I know they paid less!!).
I may have an extra ticket for a game later in the year if you are interested...you wouldn't be sitting by me since the ticket is in another section, but I'd give it to you for free. Just need to confirm what games I am getting. (reason I woudl have extra is I have a pair a friend offered me to go with the gf, if I get those for a game for which I already bought a single, the single will be available)
Regards,
Menelaos