In the Krause catalog, they list the 1884-H 10 para from Serbia as having medallic alignment. Is there also a variety with coin alignment, and if so is there any premium put on it as far as value is concerned?

Mandic says that all the 1884 Heaton issues are coin alignment.

Krause is seriously lacking in their information from Serbia. There are also some errors in their listings for the 1915 issues.

I have a question regarding the 1915 Serbia issues of 50 para and 1 dinar. These coins with coin die alignment are mentioned but unpriced in Krause. Does it mean that coin alignments for these coins are rare?

According to Mandic, the 1915 issues are ALL coin alignment. There is mention of a pattern/trial/error piece of 1 dinar in medal alignment, valued at €500, documented in 1997.