B &D lilies but they are pricey. I look for sales and scoop them up then. From B & D, I have a fantastic "golden splendor" strain that is super fragrant too.
I have purchased a few orientals and orienpets through coops either here or on cubits.
Just be careful with the source for the coop as I once got bulbs that once they started growing, clearly had the mosaic virus and I had to destroy them.
Edited to clarify that the coop with the virus bulbs was not here and not on cubits and many years ago. I did contact the host and inform them ( including pictures) They said they would inform the supplier but nothing came of it....last coop I did with them.