I was lucky, as I got mine this week from the greengrocers . Two big bundles of bare rooted ones for £2 ( about 14 plants)
I've gone for white only, grown from seed.
I bought a big pot of little seedlings from a local garden centre for £3.50.
Could of got 20-25 plants out of it.
Made 15 good ones and potted them up in the greenhouse.
Planted them all out today with nice healthy root systems
Planted wallflowers, stocks, hollyhocks, pastel Sweet Williams out at the front, got rid of Juniper Horizontalis (?) and Cotton Lavender (got bored with them). Dug in home made compost first as the soil was very poor where those two shrubs had been.