I just purchased a 2009-D SACAGAWEA which appears to have a spacing error or "slip" on the edge lettering. Any ideas on how often this happens and ballpark amount it is worth in BU condition? Would it be worth sending it to a grading company? link to actual coin: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130409697179&ssPageName=STRK:MEWAX:IT
