If you after good quality plain t-shirts, you might be interested As Colour classic tees. Classic tees are heavy weight 220 GSM, pre-shrunk. This works out to be cheaper than ordering directly from As Colour website, where they sell for $18.01 if you order 4-9 t-shirts, but there's $12 shipping.
Just ordered 4 for myself.
To see all Culture Kings sale items sorted by highest discount, price history and setup sale alert:
How is the cut compare to staple t