https://www.bestbuy.com/site/sear…&keys=ke
S15 – 119.99/pair. On amazon cheapest it has been was 139 (per camelcamelcamel).
S55 – 169.99/speaker. Available for few dollars cheaper on amazon . Only few dollars off the lowest price.
The S20, S30, S35, and S50 are on sale too. Check amazon and Best buy when buying.
https://www.bestbuy.com/site/sear…&keys=ke
UPDATE: Check Crutchfield too. $5 cheaper on site. Don’t know their return policy.