Hi,
It actually does add a premium to the obsolete coins. $3.00 to $5.00 would be a reasonable range for a Winged Liberty Head dime with clash marks that are that prominent.
In the overall scheme of things clashed die errors are fairly common.
It would not be likely to show up in the Cherrypicker's Guide but if someone were doing a study on these dimes, it might be an interesting addition to a book:-)
It's not what I call a "million dollar wonder" but it is a fun coin:-)
Have Fun,
Bill