for 1500 you will not be able to get a practical motor swap unless you get really lucky. junkyards are ok if you can find what you need b/c you can see the odometer and start the car. a b16a2 will be the closest to your budget.
www.osakajdm.com --i think thats right-i heard good and bad
www.hmotorsonline.com
www.importsalvageauto.com--heard nothing but good but you pay for what you get
just make sure to research the company first b/c it is a big investment