Deal ends 5/21/19 as per T-Mobile page
For a limited time, save up to $300 when you purchase a new Samsung Galaxy S10e, S10, or S10+ at Full Retail Price (plus tax) from a Costco Warehouse and trade-in an eligible device. Fulfilled via one-time credit for fair market value of trade-in device, then remainder via rebate.
Yes, it's less back than past offers and requires a trade-in, but does not require adding a line
and works on any voice rate plan
, so those with grandfathered accounts that do not want to mess with their rate plan can possibly get a deal.
Some better than market values offered on the trade-in list, such as Pixel 1
Trade in an eligible device in good condition on the same order as your new Samsung:
Eligible trade-ins for $300
Apple iPhone 7, 7 Plus, 8, 8 Plus
Samsung Galaxy S8 series, S9 series, Note8
LG V40, V30, V30+, G7, Google Pixel 2, Pixel 2 XL, Pixel, Pixel XL
*** Possibly Samsung S7. List at Costco shows S7 being on the $300 tier, not $200. You may receive the lower amount, but a message to T-Force and sending them a copy of the documents from Costco will probably resolve it.
Eligible trade-ins for $200
Apple iPhone 6s, 6s Plus, 6, 6 Plus
Samsung Galaxy S7 series, Note5, S6 series
LG V20, G6
Eligible trade-ins for $100
Apple iPhone 5c, 5, 5s, SE
Samsung Galaxy S4 series, S5 series, Note4
LG G5, G4, V10
OnePlus 5, 5T
Current In warehouse prices before tax after $100/$150 additional discount:
YMMV: Costco's May coupon book shows the S10 will be $200 off, so $649.99. If you bought at $749.99 you might be able to get $100 refunded on 5/22
Use a Citi card for possible/likely price rewind if you think better deals will come due to S10 5G release.
Personal opinion of OP: This deal probably won't be attractive to anyone hoping to flip the phone for a profit, but for someone who needs to replace a phone for personal use and doesn't want to deal with adding and cancelling lines, or can't add lines, I don't know of a better deal.