I have a PR3 domain but need to change it. If I purchase a new domain with a PR0 and use a 301 redirect will the new domain show as a PR3?
You can't say for certain that it will retain it's original ranking after the domain change, but if you use proper 301 redirecting it could take from 3 to 6 months for your new domain to retain most of your domains PR and if you generate some more backlinks to your new domains also during this time then it can obtain its previous page rank.