I need 4.2 BTC, and because of all the wait a few days to be verified crap (Currently waiting for 30 days via Dwolla), I'd much rather go with Paypal as of now. I can't really wait the 30 days. I'll do a cash deposit via bitinstant if I must, but this would be 100x more convenient. Who can do it?
You can probably find someone that will do it in the Currency Exchange section, I've bought BTC with PP off members there several times but you'll have to provide lots of information about yourself and expect to pay a premium (Last Mt. Gox rate was around $12.87 so not sure if you'll be able to get 4.2 for $55 without a premium). You could also try Virwox or Ebay but those places will also charge a high rate but that's the price of doing business with Paypal.
Bitinstant is a great way to go, after doing a couple PP trades here I tried doing a bank deposit using Bitinstant and it was extremely easy and I had my bitcoins already in my wallet within 10 minutes of doing he deposit.
