What is the cheapest motel in Solvang or near the city?

I am thinking super 8 or motel 6.

also, is priceline any good?

Priceline is ok -- but you never know what or where you'll get put.

Here's a list of 4 good hotels in the area:

http://www.resideo.com/us/california/solvang/

Click 'Check Availability', choose your dates, then choose and book your room right online.

Check http://www.tripadvisor.com/ and read reviews before you decide.

Have a safe trip!