[Derision]

Seems OK on my test server. What do you get with these queries:

mysql> SELECT id, Name, Price, sellrate FROM  items WHERE  Name LIKE  'Rusty Dagger';
+-------+--------------+-------+----------+
| id    | Name         | Price | sellrate |
+-------+--------------+-------+----------+
|  7007 | Rusty Dagger |    30 |        1 |
| 13346 | Rusty Dagger |    30 |        1 |
| 94100 | Rusty Dagger |     0 |        9 |
+-------+--------------+-------+----------+
3 rows in set (0.00 sec)

mysql> select * from rule_values where rule_name like 'Merchant:BuyCostMod';
+------------+---------------------+------------+-------+
| ruleset_id | rule_name           | rule_value | notes |
+------------+---------------------+------------+-------+
|          1 | Merchant:BuyCostMod | 0.94999998 |       |
+------------+---------------------+------------+-------+
1 row in set (0.00 sec)