Getting a used rear differential

[blue thunder]

I am in need of a rear differential and wanted to get some feedback on here. I did a search online and got a bunch of offers e-mailed to me. I have only talked to one seller and I got the price down to 300.00 for a 95 (same year as mine). I forgot to ask and he didn't say it was tested or even warrantied. Its a salvage yard and I guess they assume it works. I got a used tranny online years ago and got ripped off. With the labor charge I'll be paying to have this put in I need some ideas or assurance before chancing this. Any feedback will be considered. Thanks.


Mike