I've never ordered from them, but Bike24.com has some really good pricing and availability right now.
28mm tubeless has been hard to come across at a decent price, but they're showing Power Roads at ~$45, Pro One Evos at ~$40, Veloflex Corsa Evo ~$45, etc.
The prices on 25mm tires is a little lower than that of the 28s and they've got even more SKUs available, most notably the GP5kS TR at ~$60.
Shipping to the US seems to be a flat ~$20, so as long as you're ordering more than one tire, these are some pretty good all-in prices.