Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_127511_1 ( solidv4 VARCHAR, pacbio VARCHAR )

### Question ###
How much was solidv4 when pacbio is $300 usd?

### Accurate SQL ###

SELECT solidv4 FROM table_127511_1 WHERE pacbio = "$300 USD"