The guy I'm dealing with recommended the site and he refuses any other escrows with the excuse of dealing with elitescrow.com before without any issues.
What's your opinion?Should I avoid the deal?
avoid for sure and I'm happy for yourself, that you was smart to ask and find out, that there is something fishy behind. if somebody wants to use only one escrow and simple denying to use anything / anybody else, you may be 100% sure, that he is somehow related to escrow site / person itself and you will be sooner or later bloody scammed.
..just for curiosity, what was the deal about? you were BTC sender, right..? any details to share?