CREATE TABLE table_name_46 (issue_price VARCHAR, mintage VARCHAR, artist VARCHAR, year VARCHAR)

What is the issue price of a Year 2000 coin by artist John Mardon of the Included in Steam Buggy mintage.
SELECT issue_price FROM table_name_46 WHERE artist = "john mardon" AND year = 2000 AND mintage = "included in steam buggy"
SELECT "issue_price" FROM "table_name_46" WHERE "artist" = "john mardon" AND "included in steam buggy" = "mintage" AND "year" = 2000