Meaning...

The mouse I currently use has the standard 3 buttons with additional buttons on the left and right. I want a mouse with more.

Not looking to spend a ridiculous amount.

I have one I might be able to sell you. It has two main buttons, two thumb buttons, and two clickable scroll wheels. Works fine, I just don't really need more than one mouse. $15 ?

dash.. thats prolly not what hes looking for... and honestly i can think of only a few 6+ button mice.. im sure those with one prolly will want to keep it.. and it prolly wont be going cheap...

but if you really want one... heres a few on newegg

http://www.newegg.com/Product/ProductList.asp?Submit=Property&Subcategory=65&Description=&Type=&srchInDesc=&MinPrice=&MaxPrice=&PropertyCodeValue=837%3A7064&PropertyCodeValue=837%3A7066&PropertyCodeValue=837%3A7062&PropertyCodeValue=837%3A15805&PropertyCodeValue=837%3A7063

theres a few under $10 and a few more under $20