Poster Values ???

[bhouze]

obviously you get what someone is willing to pay. But it's also good to have an idea of the value of the item you have.
I have a pair of smaller warhammer fantasy posters I got when my local retailer closed shop.
I did have them plaked (mounted on particle board) at my nearest Costco so that may add or detract from the value.
They both have a yellowy background and the warhammer symbol on the bottom.
one has a pic of an empire knight (no helmet) that reads like a recruiting poster for the empire
the other has a cool looking (black?) ork with the title marauding bands of orks are pillaging the countryside (or something top that effect)
They are easily 5+ years old.
Just wondering if someone has seen either of these for sale and what they asking price was so I can get an idea of the value.

Thanks