Looks like this is the cheapest this modem has been doing a search here.
ARRIS SURFboard SB8200 DOCSIS 3.1 Cable Modem at Amazon
List Price: $199.99
Price: $169.51
Coupon on page – $20
$149.51 + Tax
https://www.amazon.com/gp/product/B01N6SKK1G
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