Home Depot sometimes sells them. Plant Delights sells them mailorder.

There's a garden center in Hillsborough on the north bound side of 206, forget its name - looks like a former flea market - everything stacked up on tables outside, rows of arborvitae - and they've had largish oleanders at relatively cheap prices, disposables for the pool-side I think.

Is oleander hardy in NJ? Also remember that the entire plant is toxic, harmful to pets and children.

Birdgardener may be referring to Ash's Flower Farm.

Here is a link that might be useful: Ash's

Shoprite has them now.