Business seller

Just wanted to gather some opinions from those in the know...

Is it better to create a business seller account straight when you initially register or to create a private ebay account and change it to business a few months down the line when you have feedback and a bit of trading history?

I ask because on my old private account, I used to be able to list variations of the same item in one listing. However earlier on when I tried doing this on an old (2002 registered account) it wouldn't let me? It point blank refused unless I upgraded to a business seller.

I've got a few stealth accounts maturing and gathering feedback at the minute, but I now know they need to be business seller accounts or they are pretty worthless to me!

All opinions welcome