For the the sake of your sanity, Will, don't look.
For the sake of having funds for food, don't look.
For the sake of having shelter during this cold winter, don't look.
For Pete's (above) sakes, just don't look.
I write this with frantic anxiety as I am looking.
OK, that wasn't helpful. How about doing something else that feeds your soul? I suggest that aside from avoidance, you try diversion. Although, you do run the risk of wanting to collect if you divert towards something that has the potential of becoming collectible. (For instance, I got diverted towards Battlestar Galactica specifically and now I have been spending way more money on a limited number of Battlestar Galactica stuff than I have ever spent on hundreds of posters.)
Here are some suggestions at diversion:
Painful:
1. Flogging.
2. Self-mental abuse.
3. Sleep deprivation.
Pleasurable:
1. Spend more one-on-one time with your wife. The benefits are many-fold with this one, my friend.
2. Spread out all your posters and invite friends, colleagues, acquaintances and people off the street over to your house where you explain why each poster is important.
3. Engage in heated online debates about anything but posters. (This works great for many of us.)
If these fail, I can prescribe an intravenous sedative for you. Propofol works great.
Jeannie