I got a roll of 2008 Arizona Quarters and I found lots of these errors. edited I think that this is a very unique error. edited
Are you referring too the base of the cactus? if so then you are committing highway robbery just a common "error" some are into this type of thing,but i really dont get into all the hype, but there are alot of people on feebay that are drawn too this crap. btw, just clicked in my head, this post will be deleted unless you pull the auction link. read the TOS agreement, (no one shall self advertise, either thru post or linking)
The error you see is the one cactus error. I think these are relatively common. Out of four rolls, I actually have put together a full roll of these. The more rare error, and more expensive one is to find one with a second cud extending into the date. A good price on the one cactus error is around $2-3 right now, some are going for a little less, some a little more. The date error is going anywhere from $22-35 right now. Although I usually like the classics, for some reason I am drawn to varieties, be they moderns or classics, with cool names...spitting eagle, hangnail or the extra leaf, extra feather, extra cactus. I can't explain why