How much should i pay for a 230F engine complete ?

It will depend on your location but here in southern Cali a Pick and Pull will charge you ~$125, the full service yard is ~$350. Volvo engines last so long there is not a huge market for used ones. Dave Shannon snipped-for-privacy@cox.net (Spring Valley CA)

If you pull it yourself figure $125-$150, but you can take your chances and get a core motor for $75 at the pick a part around here, those are often perfectly good, it's just that the cars occasionally get hit hard enough to smash the ignition module or other part nessesary for the engine to be tested. Good tested pulled motors are $300-$350.