Cricket is offering 50% off the Galaxy S8 when you switch by porting in from a non-AT&T carrier.
$700 x 50% = $350 plus taxes
https://www.cricketwire
Looks like they will lock to Cricket for 6 months.
S9 is right around the corner so S8 deals are starting to pop up.
Fine Print
*Ends 3/29/18. Req’s svc activ. (in store, up to $25/line) w/ qual. plan (min. $30/mo), port-in, and new svc line. First mo. svc charge & applicable sales tax due at sale. Excludes AT&T ports. Online only. May not be combinable with certain offers, discounts, or credits. Phone may be restricted to Cricket svc during first 6 months after activation. By activating/using svc, you agree to Cricket Terms of Service (cricketwireless.com/terms). Svc good for 30 days and is subject to Cricket network management policies, see cricketwireless.com/mobile broadband for details. Return Fee: $25; add’l one-time fees may apply; see cricketwireless.com/fees for details. Pricing, terms, & other restr’s subject to change and may be modified or terminated at any time without notice. Coverage & svc not avail. everywhere. © 2018 Cricket Wireless LLC. All rights reserved.